Answer:
Nanotechnology is a field of producing materials and devices from atoms and molecules.
Explanation:
Nanotechnology is a field that concerned with producing materials and devices from atoms and molecules. A nanometer is one-billionth of a meter in size. Nanotechnology can be used to “recognize” the cells of interest which allows associated drugs to reach diseased tissue without damaging healthy cells. Nanotechnology produces new and faster kinds of computers, more efficient power sources and more effective medical treatments. Main disadvantages include threats to security, privacy, health and the environment. More research must be done in this field to get more benefits from it.
Eye color in a particular strain of fly is influenced by one gene with two alleles: a dominant allele that results in red eyes and a recessive allele that results in sepia eyes. A red-eyed female from a true-breeding population is mated with a sepia-eyed male. The Fl offspring are all red-eyed. The Fl flies are allowed to interbreed, producing the following in the F2 generation.
Females: 40 red eyes; 13 sepia eyes
Males: 39 red eyes; 11 sepia eyes
Which of the following best describes the likely mode of inheritance for the eye-color gene?
a. The eye-color gene is likely autosomal because males and females have similar phenotype ratios.
b. The eye-color gene is likely autosomal because more females have sepia eyes than males do.
c. The eye-color gene is likely sex-linked because the males and females have similar phenotype ratios.
d. The eye-color gene is likely sex-linked because the males and females display both phenotypes.
Answer:
The correct option is a. The eye-color gene is likely autosomal because males and females have similar phenotype ratios.
Explanation:
Available data:
Eye color is influenced by a diallelic gene R dominant allele results in red eyesr recessive allele results in sepia eyesCross: true-breeding red-eyed female with a sepia-eyed maleF1: 100% red-eyed.F2: Females: 40 red eyes; 13 sepia eyesMales: 39 red eyes; 11 sepia eyes
77% of the total progeny has red eyes and 23% has sepia eyes.
Among females, 75% is red-eyed, and 25% is sepia-eyed
Among males, 78% is red-eyed, and 22% is sepia-eyed.
The general phenotypic ratio is 3:1
If the eye-color gene was sex-linked, the phenotypic ratios would be different. There would be a higher proportion of red-eyed females than red-eyed males. Females would only express red eyes, while males would express red and sepia eyes. This is
Cross: X⁺X⁻ x X⁺Y (Note: The symbol + represents the allele R
Phenotype: red-eyed both and the symbol - the allele r)
Gametes) X⁺ X⁻ X⁺ Y
Punnett square) X⁺ X⁻
X⁺ X⁺X⁺ X⁺X⁻
Y X⁺Y X⁻Y
F2) 3/4 of the whole progeny would be red-eyed
1/4 of the whole progeny would be sepia-eyed
BUT
Females: 100% red-eyed
Males: 50% red-eyed and 50% sepia-eyed
These proportions are not coincident with the exposed real proportions
So,
c. The eye-color gene is likely sex-linked because the males and females have similar phenotype ratios.
If this gene was sex-linked, Males and females would not have similar phenotype ratios. This is FALSE.
d. The eye-color gene is likely sex-linked because the males and females display both phenotypes.
If this gene was sex-linked, Males would display both phenotypes, but females would only be red-eyed. This is also FALSE.
According to this, we can assume that this is an autosomal gene. If this is true, then
Cross: Rr XX x Rr XY
Gametes) RX, RX, rX, rX
RX, RY, rX, rY
Punnett square:
RX RX rX rX
RX RRXX RRXX RrXX RrXX
rX RrXX RrXX rrXX rrXX
RY RRXY RRXY RrXY RrXY
rY RrXY RrXY rrXY rrXY
F2) From the whole progeny
12/16 = 3/4 = 75% would be red-eyed 4/16 = 1/4 = 25% would be sepia-eyedPhenotypic ratio 3:1
Among females
6/8 = 3/4 = 75% would be red-eyed, R-XX 2/8 = 1/4 = 25% would be sepia-eyed, rrXXPhenotypic ratio 3:1
Among males
6/8 = 3/4 = 75% would be red-eyed, R-XY 2/8 = 1/4 = 25% would be sepia-eyed, rrXYPhenotypic ratio 3:1
The phenotypic ratio in all cases are 3:1.
b. The eye-color gene is likely autosomal because more females have sepia eyes than males do.
Both males and females exhibit sepia eyes in equal proportions. This is FALSE
a. The eye-color gene is likely autosomal because males and females have similar phenotype ratios.
Males and females do have similar phenotype proportions of red eyes and sepia eyes. This is TRUE
The phase of mitosis that is characterized by the formation of chromatids is
___
Answer:
The phase of mitosis where chromatids are formed is Metaphase
11. Fossil fuels are considered nonrenewable resources because of -
a. Where they come from
b. How they are produced
c. How useful they are
d. How long they take to
HELPPPOPPPPPPPPPpppppp
Answer:
SeA URCHINS (SOOOOOOOOOOOOOOO SURE ABOUT MY ANSWER) dont blame me if you get it wrong because i said im sure
Explanation:
If u looked at a SA cells and cardiac muscle cells under a microscope, do u think they would look the same or different from each other? Explain ur reasoning HELP MEE PLSSSSS
Answer:
They look a little bit different. SA cells contain fewer mitochondria, fewer myofibers, and a smaller sarcoplasmic reticulum. This means that the SA node cells are less equipped to contract compared to the atrial and ventricular cells.
when you mix instant coffee creamer sugar and hot water all together what kind of mixture are you going to form
Answer:caffe
Explanation:
URGENTTT
Which of the following best describes how independent assortment results in inherited variations within a species and how it contributes to evolution?
A Independent assortment results from the copying of DNA during cell division and causes variations that are sometimes beneficial to a species
B Independent assortment results from the binary fission of a single cell and causes mutations that can be beneficial or harmful to a species
C Independent assortment occurs during mitosis and causes uncontrolled cell division which is harmful to a species
D Independent assortment occurs when chromosomes separate during meiosis and causes variations that can be beneficial or harmful to a species
Answer:
D Independent assortment occurs when chromosomes separate during meiosis and causes variations that can be beneficial or harmful to a species
Explanation:
During meiosis, the homologous chromosomes separate and segregate independently of each other. This process is referred to as 'independent assortment'. In consequence, different gene variants or 'alleles' localized in homologous chromosomes segregate independently of each other during gamete formation, thereby one particular gamete has an equal probability to carry either of these segregating alleles. Independent assortment generates genetic variation in the gametes, which can be beneficial or deleterious in a given environment.
The option that best describes how independent assortment results is D Independent assortment occurs when chromosomes separate during meiosis and causes variations that can be beneficial or harmful to a species
What is independent assortment ?Independent assortment is a phenomenon that occurs during meiosis, which is the process of cell division that produces gametes (sex cells). During meiosis, the chromosomes are randomly sorted into the gametes. This means that the alleles (different forms of a gene) on different chromosomes can be inherited together or separately.
This random assortment of alleles can lead to new combinations of traits, which can be beneficial or harmful to a species.
Find out more on independent assortment at https://brainly.com/question/30597025
#SPJ6
K12 ELA 7th grade science interim
answers are labeled as numbers and letters a b c and d (1c 2d 7a 9b etc)
1A
2C
3D
4C
5B
6B
7B
8A
9D
10C
11D
12C
13C
14B
15B
16B
17A
18A
19C
20C
21B
21B
23B
24C
25B
I FEEL VERY GUILTY AND BAD
YOUR WELCOM
Answer:
wait what grade are u in?
PLEASE I BEG YOUUUU HELP
Answer:
C
Explanation:
What unit of time on Earth is based on the revolution of the Moon around the Earth?
A. day
B. year
C. hour
D. month
Answer: I think it’s months
Because I found this information... The Moon appears to move completely around the celestial sphere once in about 27.3 days as observed from the Earth. This is called a sidereal month
The text box below contains facts about salmon:
Facts about salmon. baby salmon migrate from freshwater streams and rivers to the ocean.
in the ocean, baby salmon d/r/i//n/k salt water.
Special cells on the salmon's gills called c/h//l/o//r/i/d//e cells help the salmon to e/x/c/r//e/t//e/ salt.
How do populations of baby salmon respond to changes in s/a//l/i//n/i//t/y as they migrate?
The baby salmon u/t/i/l/i//z/e// special structures but do not a/l/te/r/ their behavior.
The baby salmon al/t/e/r/ their behavior and u/t//i/l//i/z/e special structures.
The baby salmon u/t/i//l//i//z/e special structures to a/l/t/e//r their behavior.
The baby sa.l.m.on a/l/t/e/r their behavior but do not u/t/i/l//i/z/e special structures.
Answer:
what even is the question i am so cunfuzzles
In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One collecting site was in Sonora, Mexico. The other three were in Chihuahua, Mexico. Dr. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. However, the dark-colored mice from the three Chihuahua locations were slightly darker than the dark-colored mice from the Sonora population. The entire Mc1r gene was sequenced in all 68 of the mice collected. The mutations responsible for the dark fur color in the Sonora mice were absent from the three different populations of Chihuahua mice. No Mc1r mutations were associated with dark fur color in the Chihuahua populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases.
Complete question:
In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One collecting site was in Sonora, Mexico. The other three were in Chihuahua, Mexico. Dr. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. However, the dark-colored mice from the three Chihuahua locations were slightly darker than the dark-colored mice from the Sonora population. The entire Mc1r gene was sequenced in all 68 of the mice collected. The mutations responsible for the dark fur color in the Sonora mice were absent from the three different populations of Chihuahua mice. No Mc1r mutations were associated with dark fur color in the Chihuahua populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases.
How does this study support the concept that natural selection is not random?
Answer:
The study supports the concept that natural selection is not random because in different areas with the same or very similar environmental characteristics, the same phenotype was produced by different types of mutations.
Explanation:
All of the sampled animals are inhabiting dark substrate. Probably animals needed to camouflage to survive. Natural selection must have driven them to produce dark color, similar to the substrate color. So animals from the different regions suffered different mutations that drove them to have almost the same dark fur color. The environmental condition is favoring the same phenotype.
In quiet breathing, muscular effort is used mainly in inspiration, and expiration is largely passive, due to elastic recoil of the lung. It results in a pattern change between expiratory and inspiratory flow. Explain changes you observed in the recordings you obtained. 1 pts Enter your answer here
Answer:
During quiet breathing, the main muscular effort is made in the inhalation process and the expiration process is mainly passive as it depends on the inhalation.
The expiration occurs due to the elastic recoil that causes a decrease in volume. In this process, the contraction of the diaphragm helps in the inhalation which is least affected by the intercostal muscle. During quiet breathing, the rate of inhalation and expiration time is relatively proportionate to one another.
During quiet breathing, the main muscular effort is made in the inhalation process and the expiration process is mainly passive basically depends on the inhalation because of elastic recoil that causes a decrease in volume.
During this, the contraction of the diaphragm helps in the inhalation which is least affected by the intercostal muscle whereas quiet breathing, the rate of inhalation and expiration time is relatively proportionate to one another.
What is Breathing?Breathing is the process of moving air into and from the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen.
Thus, in quiet breathing, the main muscular effort is made in the inhalation process and the expiration process is mainly passive basically depends on the inhalation because of elastic recoil that causes a decrease in volume.
To learn more about Breathing click here:
https://brainly.com/question/3945277
3) What evidence did scientists use to develop
the Law of Superposition?
a. Fossils only
b. Rock layers only
c. Rock layers and fossils
d. Fossils and environment
How many eggs are initially produced; approximately how many eggs does Melinda still have at the age of 317
ANSWER: But Melinda created all her eggs when she looked like this, a fetus in her mother's womb. Within a couple of months, she created several million eggs. And then, the eggs began to die. At the age of 31, Melinda may only have a few thousand left.
Which is NOT a part of cell theory?
A. The basic unit of life is a cell.
B. All cells are produced from other living cells.
C. All cells need light to live.
D. All organisms are made of cell.
What are the nervous and endocrine systems controlling to maintain homeostasis?
O A. the body's nitrogen levels
B. the body's internal environment
OCthe body's external skin and hair
0
D. the body's support for movement
Answer:
B. the body's internal environment
Explanation:
Homeostasis is defined as the process of maintaining the internal environment of the body.
All the systems work together to maintain homeostasis. The nervous and endocrine systems are two important system that helps in maintaining homeostasis.
The nervous and endocrine systems are linked with hypothalamus that controls the internal environment of the body by releasing and inhibiting hormones. These hormones keep pH, temperature, and other internal conditions stable that support homeostasis.
Hence, the correct answer is "B. the body's internal environment".
What theories of the moon's creation have scientists debunked?
Answer:
Scientists have determined that Earth and the moon most likely could not have formed together when the solar system was created. If they had, the moon would have a large iron core like Earth's, but it instead has a small iron core.
Explanation:
hope this helped and if it did give a like and a rating :D have a great day!
I neeeeedddddddd helpppppppp
how is the prairie ecosystem similar to the native plant ecosystem?
Answer: Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees,
Native plants are plants indigenous to a given area in geologic time. This includes plants that have developed, occur naturally, or existed for many years
so in conclusion there is a large difference between them
In recent years the elephant population in certain African ecosystems have seen a decreased. The decrease is most likely due tl
Answer:
mostly poaching
Explanation:
i dont know if this was the answer you wanted but...
nvm I had my head on the wrong question
For over a decade, farmers in the U.S. have been planting genetically modified crops. An example of one of these crops is corn that is resistant to weed-killer. This makes it so that no corn is lost due to contact with herbicide meant to kill weeds. While this is seen by many as a positive development, others see it as a cause for concern. What is one possible negative side effect of planting genetically modified corn?
Answer:
D
Explanation:
hope it helps
6. In corn plants, normal height (H) is dominant over short height (h). Complete a
hybrid (heterozygous) cross.
Hybrid
Corn
н һ
Phenotype Probability (%)
H
Normal Height:
0%
Hybrid
Corn
h
Short Height: 0%
Answer:
See the answer below
Explanation:
Normal height - H
Short height - h
Heterozygous - Hh
A cross involving heterozygotes would be Hh x Hh
Hh x Hh
HH Hh Hh hh
Since H is dominant over h;
HH and Hh would produce normal height phenotypes.
hh will produce a short height phenotype.
Thus;
Probability of normal height phenotype resulting from the cross = 3/4 or 75%
Probability of short height phenotype resulting from the cross = 1/4 or 25%
What reproductive cells produce new fungi?Question 5 options: spores seeds hyphae buds
PLEASE HURRY
20 points
In one species of guinea pig, the gene for black fur is dominant while the gene for
brown fur is recessive. A male guinea pig with black fur and a female guinea pig with
black fur produce a female offspring with black fur. Which of the following BEST
describes why the trait for fur color is transferred from the parents to the offspring?
O Genetic mutations
O Acquired traits that are passed on through mitosis
O Environmental conditions such as the type of cage the owner keeps the guinea pig in
O Genes store hereditary information in the DNA of a cell, that leads to traits passing from one
generation to the next
Answer: it is D
Explanation: if you get a gene from your parents it's a gene you get it's not a mutation because if it was it would've been like a calico color but since it's just black it's D.
Transcribe this piece of DNA into RNA - ATTG
ASAP PLEASE ! I’m giving 20 pts
Answer:
AUG
Explanation:
Answer:
The Awnser is AUG
Explanation:
Which step is a protein formed during gene expression?
a. reverse transcription
b. translation
c. dehydration synthesis
d. DNA replication
Help fast plz
A population of organisms has adapted so that the organisms are better able to survive in their environment. What will most likely happen to the population of
organisms?
a) It will increase.
b) It will decrease.
c) It will stay the same.
D)none of the choices given
Which veterinary professionals design the veterinary curriculum?
Answer:
vetatm meds
Explanation:
Answer:Veterinarians
Explanation:
When and where does DNA replication occur in eukaryotic cells?
A) Once in a cell's life (before division), inside the nucleus.
B) Twice in a cell's life,
inside the cytoplasm
C) Several times in a cell's life, inside both the nucleus and cytoplasm.
Answer:
the answer is A
Explanation:
because hehwhehdh