Answer:
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Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
An earthquake is best described as a
I need an edg answer
Answer:
short term
Explanation:
Answer:
short term
Explanation:
please mark as brainliest
Which mutation is harmful to the organism
A, a mutation allowing moths to camouflage better on blackened tree bark
B, a mutation making staphylococcus aureus resistant to the antibiotic methicillin
C, a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell
D, a mutation causing uncontrolled cell division
E, a mutation giving plant leaves a bitter taste to discourage herbivores from eating them
Answer:
D,The Mutation causing uncontrolled cell division is the correct answer.
A cell has two pairs of submetacentric chromosomes, which we will call chromosomes Ia, Ib, IIa, and IIb (chromosomes Ia and Ib are homologs, and chromosomes IIa and IIb are homologs). Allele M is located on the long arm of chromosome Ia, and allele m is located at the same position on chromosome Ib. Allele P is located on the short arm of chromosome Ia, and allele p is located at the same position on chromosome Ib. Allele R is located on chromosome IIa and allele r is located at the same position on chromosome Ib. Allele G is located on the long arm (q arm) of chromosome Ia, and allele g is located at the same position on chromosome Ib. Allele N is located on the q arm of chromosome IIa and allele n is located at the same position of chromosome IIb.
Required:
a. Draw these chromosomes, identifying genes R, r, G, g, N, and n as they might appear in metaphase I of meiosis. Assume there is no crossing over.
b. Taking independent assortment and the subsequent random separation of chromosomes in anaphase I, draw the chromosomes, with genes identified, present in all possible gametes that could result once this cell completes meiosis. As above, assume there is no crossing over. Explain in your own words what is meant by independent assortment.
Answer:
Note: You will find the chromosomes and the gametes in the attached files
Chromosomes:
IA ----------G-----о---------IB -----------g-----о----------IIA --------N--------------о------R----IIB ---------n--------------о-------r----Gametes:
Gamete 1: GNR Gamete 2: Gnr Gamete 3: gNRGamete 4: gnrIndependent assortment occurs when the alleles of two or more different genes distribute in the gametes independently from each other.
Explanation:
Available data:
two pairs of submetacentric chromosomes
IA -------------------о-----------
IB -------------------о-----------
IIA ----------- ------------о------------
IIB ------------------------о------------
chromosomes Ia and Ib are homologs
IA -------------------о-----------
IB -------------------о-----------
chromosomes IIa and IIb are homologs
IIA -----------------------о------------
IIB ------------------------о------------
Allele M is located on the long arm of chromosome Ia, and allele m is located at the same position on chromosome Ib
IA -------M----------о-----------
IB -------m----------о-----------
Allele P is located on the short arm of chromosome Ia, and allele p is located at the same position on chromosome Ib.
IA -------M----------о------P---
IB -------m----------о------p----
Allele R is located on chromosome IIa and allele r is located at the same position on chromosome IIb.
IIA ------------------------о------R----
IIB ------------------------о-------r----
Allele G is located on the long arm (q arm) of chromosome Ia, and allele g is located at the same position on chromosome Ib.
IA -------M---G-----о------P---
IB -------m----g-----о------p----
Allele N is located on the q arm of chromosome IIa and allele n is located at the same position of chromosome IIb.
IIA --------N--------------о------R----
IIB ---------n--------------о-------r----
A). Draw these chromosomes, identifying genes R, r, G, g, N, and n as they might appear in metaphase I of meiosis. Assume there is no crossing over.
IA ----------G-----о---------
IB -----------g-----о----------
IIA --------N--------------о------R----
IIB ---------n--------------о-------r----
During metaphase I, homologous pairs together migrate to the equatorial plane, where they randomly aline with their kinetochores facing opposite poles. The random arrangement of tetrads is different in every cell going through the meiosis process. There is no equal alinement between two cells. When tetrads aline in the equatorial plane, there is no predetermined order for each of the homologous chromosomes of each tetrad to face one of the poles and then migrate to it while separating. Any chromosome of the homologous pair might face any of the poles and then migrate to it. Each of the chromosomes has two possibilities for orientation at the plane. When the new haploid cells are formed, the number of variations in each cell is also different and depends on the chromosomes that form that cell. This random order in the equatorial plane is what introduces variation into the gametes. It is almost impossible that two gametes resulting from meiosis will get the same genetic charge.
B). Taking independent assortment and the subsequent random separation of chromosomes in anaphase I, draw the chromosomes, with genes identified, present in all possible gametes that could result once this cell completes meiosis. As above, assume there is no crossing over. Explain in your own words what is meant by independent assortment.
Independent assortment occurs when the alleles of two or more different genes distribute in the gametes independently from each other. In other words, a gamete receives an allele from a gene that does not depend on nor influence the allele of another gene in the same gamete. This can only be applied to independent genes. An organism gets only one of the members of the chromatids pair of each parent.
During gamete formation in meiosis, the pairs of homologous chromosomes separate after crossing over, and then chromatids sisters also separate, resulting in the formation of four gametes. Each gamete has different information from the combination of homologous chromosomes belonging to the father and to the mother.
There are four possible combinations, considering that there is no crossing over.
Gamete 1: GNRGamete 2: GnrGamete 3: gNRGamete 4: gnr
How “Competition in an ecosystem” is playing a role in life?
Answer:
Competition is an interaction between organisms or species in which both the organisms or species are harmed. Limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.
Explanation:
What organisms are capable of photosynthesis?
A. Plants only
B. Plants and algae only
C. Plants and some bacteria only
D. Plants, algae, and some bacteria
Answer:
D) Plants, algae, and some bacteria
Explanation:
Photosynthetic organisms include plants, algae, euglena and bacteria
What is the purpose of xylem?
Answer:
xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized, water-conducting cells known as treachery elements. The vascular system is comprised of two main types of tissue: the xylem and the phloem. The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.
Explanation:
77 POINTS, PLEASE HELP ASAP
1): Lily is dressing up as a chicken for Halloween this year and is flapping her arms like a bird as she walks from house to house. As Lily flaps her arms down to her sides, what type of movement is occurring?
2): Katie loves pretending that she’s a human cannonball. As she jumps off the diving board, she assumes the proper position before she pounds into the water: head and thighs tucked against her chest; back rounded; arms pressed against her sides while her forearms, crossed in front of her shins, hold her legs tightly folded against her chest. What movement term would best describe the positioning of Katie’s vertebral column, head, thighs, lower legs and lower arms? HINT: She is about as far from the anatomical position as she can get.
Answer:
1. abduction & abduction
2. flexed
PLEASE HELP PLEASE
What is true about Smooth muscle cells?
) total suspended solids are mostly responsible for
a) turbidity b) colour c) odour d) taste
Answer:
I think the answer is colour
Eating food is an example of which type of energy?
a. Thermal energy
b. Mechanical Energy
c. Radiant Energy
d. Chemical Energy
Answer:
chemical energy
Explanation:
we get this from food which pur bodies use as fuels to do things like running,talking,etc
Darla is a crime scene Investigator searching for latent bloodstains. She uses a chemical process that makes blood more visible, or darker, to the naked eye. Which chemical Is she using? Α) Luminol B) Fluoresceln C) Leuco Crystal Violet D) Ascetic acid
Answer:
C
Explanation:
Leuco Crystal Violet.
As atmospheric CO2 increases, the amount of CO2 dissolved in seawater is expected to increase as well. This produces more carbonic acid, which then dissociates into hydrogen ions and something else.
Answer:
bicarbonate ions
Explanation: (HCO3-)
Why are all of us considered scientists to some extent?
O A. Everyone has questions about the natural world.
O B. Everyone writes and tests hypotheses.
O C. Everyone takes measurements and collects data.
O D. Everyone performs scientific experiments.
Answer:
A
Explanation:
well most of these are ture (Only due to school) the one answer that would apply to people outside of a school setting it A
A new human species was found on a distant planet, whose genetic inheritance and process of reproduction is identical to that of humans on earth, however, their phenotypes are much different. You are tracking two phenotypes in this new species: eye shape and tail size. The single gene that controls eye shape (gene E) is unlinked from the single gene that controls tail size (gene T). Square eyes is the dominant eye shape and round eyes is the recessive eye shape. Long tail is the dominant tail size and short tail is the recessive tail size.
Required:
An individual of this new species is heterozygous for gene E and heterozygous for gene T. What is their genotype and phenotype?
Answer:
The individual has the genotype Ee (for the eyes) and Tt (for the tail) and has square eyes and a long tail.
Explanation:
If an individual is heterozygous, it means that he has a dominant allele and a recessive allele for each genotype. In this case, if the individual is heterozygous for the E gene, he has the genotype formed with the "Ee" alleles. If the same individual is heterozygous for the T gene, it has the genotype formed by the "Tt" alleles.
Individuals with heterozygosis will present phenotypes related to the dominant allele, since the recessive allele is only expressed in hom0zygosis. In this case, the individual will have the phenotype square eyes and long tail.
1. Explain how the atomic number and mass number of an atom can be used to determine the number of
electrons and of neutrons respectively.
Because the total of neutron and proton/electron is the atomic mass. So if you wanna find proton/electron and you know the neutron, just minus the atomic number with the neutrom and you will get the proton
Here if you need the formula
Atomic number = Total neutron + Total proton or electron
Which of these events can lead to an increase in the population size of mice?
a. Some mice emigrate (leave) in search of food
b. Cats, owls, and snakes are added
c. More mice are born than die
d. A large number of mice die because of a forest fire
e. Cheese shortage
This means the birth rate would exceed the death rate, to make a positive growth rate in the population. So overall, the population will go up if more mice are born compared to those that die off.
Choices A, B, D and E all describe factors that would either kill mice or push them out of the habitat. Either way, these answer choices would have a decrease in population rather than increase. So we can eliminate these answer choices.
Please help me ASAP please
Answer:
D
Explanation:
Because the grandparents are at the top he started it basically.
What do you mean by "in atleast 5 sentences" We were asked to write about typhoon Yolanda in atleast 5 sentences. So what do you mean by that?
Pls help.
Answer:It means in 5 sentences write about typhoon Yolanda
Explanation:
Refer to the Newsela article "The Relationship between Hunger and War."
Part A
What is the relationship between conflict and famine?
Famine and war are often interrelated.
Famines caused by drought outnumber those caused by warfare.
All historical famines were caused by warfare.
Around half of all famines are caused by armed conflict.
Question 2
Part B
Which evidence from the text best supports the answer in Part A?
"A 2018 U.N. report called the situation in Yemen "the worst human-made disaster in the modern history of the world."
“Many of the worst wars of our time are accompanied by mass starvation. In some cases, starvation is used as a weapon."
"Food insecurity occurs when there is a lack of food or it is too expensive."
“South Sudan was also the world's most dangerous nation for aid workers in 2017."
Answer: Ali said that he/she speaks turkish
Explanation: I dont know you're answer but i will do as much as possible
A light bulb gives off 2 types of energy
a. Radiant and Thermal
b. Mechanical and Thermal
c. Potential and Mechanical
d. Thermal and Chemical
Answer:
a
Explanation:
In the case of the light bulb, electrical energy is being transformed into light and thermal (heat) energy. Different wattages and types of bulbs give off varying amounts of light and heat.
Answer:
A
Explanation:
radiant because it gives light
and thermal cause it also gives heat on contact
what is a natural resources ??
Answer:
A natural resource is something found naturally that can be used by humanity to accomplish tasks. For example, wood is a natural resource as its found in nature and can be used by humanity for building and making fire for food and heat.
Explanation:
During what phase of meiosis does both nuclei dissolve, spindle forms?
Answer:
Prophase I
Events of Prophase I (save for synapsis and crossing over) are similar to those in Prophase of mitosis: chromatin condenses into chromosomes, the nucleolus dissolves, nuclear membrane is disassembled, and the spindle apparatus forms. Major events in Prophase I.
What is the function of the phloem?
Answer:
The phloem transport food which is synthesized in leaves by the process of photosynthesis to the lower part of the tree or plant.
hope it helps
_______is the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Answer:
Atomic Number
Explanation:
I found this quizlet it might help for your other problems. It has the same questions and answers.
Here: https://quizlet.com/304016728/genera-bio-ch2-flash-cards/
the atomic number
pls give me brainliest
plzzzzzzz help my lil sister out she wont stop texting me while im working
Answer:
False
Explanation:
It will only be 78% in 2040
Answer:
False.
Explanation:
63% of our energy comes from fossil fuels.
What is the net force? Is it at rest or is it in motion?
ON, and in motion
13N and in motion
0N and at rest
13N and at rest
Answer
0N and at rest :)
Explanation:
7N+6N=13N
10N+3N=13N
With a ruler, draw a line that is 20 cm long. Divide the line into five, 4-cm segments. On a scale of each segment representing one billion years, label the following events in the history of Earth:
a. formation of the earth
b. origin of life
c. evolution of photosynthesis
d. evolution of eukaryotes
e. evolution of multi-cellular life
f. the Cambrian explosion
g. first vertebrate land animals
h. evolution of dinosaurs
i. evolution of human beings
Solution:
The first traces of the life that existed on the earth can be traced back to about as old as 4.2 billion years. It indicates that life has evolved around 200 million years ago after the first appearance of the liquid water.
The origin of the life on earth is a natural process and is a series of evolution what we see today. Firstly earth was formed by dust and smoke particles and then different forms of life began to evolved on the earth.
The events of the evolution in the history of the earth is shown on the following number line below :
Particles of weathered rock are also called
A. terracing
B. humus
C. sediments
D. abrasion
A biologist grow a plant inside a sealed glass jar. The plant keeps growing for several days but then dies. At the start of the experiment, the jar had a mass of 3 kg. At the end of the experiment, it still had a mass of 3 kg. Which of the following explains why the mass was the same? * (1 Point)
•The plant created mass.
•The jar's temperature was the same as before.
•The jar was sealed and new mass could not enter.
•The plant did not grow enough to add mass to the jar.
Answer:
A planta não cresceu o suficiente para adicionar massa ao jarro
Which statements describe a bacteriophage? Select all that Apply.
A. It is a type of virus that infects bacteria.
B. It is a type of bacteria that infects viruses
C. It is a virus consisting of a protein coat and a DNA core.
D. It is a bacterial strain consisting of protein and a DNA core.
Answer:
The answer is A, and C.
Explanation: