What is the best evidence to
prove that Irene was heterozygous for hemophilia?
Elizabeth IS not a carrier for the trait.
Tatiana carried the recessive allele.
Her brother has
hemophilia and her sister is a carrier.
Two of her sons have hemophilia and one does not.

Answers

Answer 1

The best evidence would be two of her sons having hemophilia while one does not.

Hemophilia

Hemophilia is a sex-linked recessive disorder. This means that females can be homzygous normal, heterozygous, or affected by the disorder while males can either be normal or affected.

Why? This is because males have only one X chromosome (XY) while females have 2 X chromosomes (XX).

Also, the X chromosomes in males are always from their mothers while their Y chromosomes come from the father.

So, if the two X chromosomes of Irene are normal for hemophilia, none of her sons should be affected. If the two X chromosomes are affected, all her sons will have the disorders.

When one X chromosome is affected and the other is normal, it means that some of her sons will inherit the affected chromosome and have the disorder while some will inherit the normal chromosome and will be free from hemophilia.

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Answer 2

The strongest evidence that Irene is heterozygous for the condition is the fact that two of her boys have hemophilia and one does not. Because hemophilia is an X-linked recessive disorder, the X chromosome plays a role in its genesis. Males only have one X and one Y chromosome, whereas females have two X chromosomes.

If Irene were homozygous for the normal allele (non-carrier), none of her boys would receive an incorrect X chromosome, preventing them from developing hemophilia. If Irene were homozygous for the hemophilia allele (affected), all of her sons would be affected by the disease since they would inherit her X chromosome.

However, Irene may be a carrier of the hemophilia allele given that two of her sons have the condition while one does not. As a transporter, she has one typical X chromosome and one X chromosome conveying the hemophilia allele. She can pass either the typical or the hemophilia allele to her posterity, bringing about a blend of impacted and unaffected kids.

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Related Questions

Please help me out!

Which of the following is NOT true about the chromosomes in your body?

-Include 46 total chromosomes
-Include 2 sex chromosomes
-Exist in 46 pairs
-Exist in 23 pairs

Answers

Answer:

Exist in46 pairs

Explanation:

Describe the two signals and pathways that are activated when you touch something and experience pain

Answers

The medial thalamus projects to widespread areas of the forebrain, including the somatosensory cortex. Thus there are two major ascending pathways for pain: a direct lateral spinothalamic pathway and an indirect medial spinoreticulothalamic pathway.

What are the answers for questions 4 and 5?

Answers

Answer:

4. D (enzymes 1 and 3 works equally well in an acidic and alkaline environment respectively)

5. C. 2; 7; 9.5

Explanation:

The image attached to this question shows a graphical representation of the pH ranges for three enzymes. According to the image;

- Enzyme 1 reached its peak reaction rate at pH 2 (acidic)

- Enzyme 2 reached its peak reaction rate at pH 7 (neutral)

- Enzyme 3 reached its peak reaction rate at pH 9.5 (basic)

This result means that enzymes 1, 2 and 3 will work well and effectively at an acidic, neutral and alkaline environment respectively. Likewise, the optimal pH level for enzymes 1, 2 and 3 are 2; 7; and 9.5 respectively.

Hello can someone help?
Im confused

Answers

Answer:

Maybe B

Explanation:

Hi! I'm not sure... If you want to take the risk, go ahead... But IF it's correct pls mark me the brainliest

Lack of medical knowledge

Answers

Ah Yes the lack of medical knowledge something I have

I NEED HELP! Complete the table of the following element. Element: Chlorine Symbol: Cl


number of Protons:

Neutrons:

Electrons:

Atomic Number:

Atomic Mass:

Answers

Answer:

For example, the atomic mass of chlorine (Cl) is 35.45 amu because chlorine is composed of several isotopes, some (the majority) with an atomic mass of 35 amu (17 protons and 18 neutrons) and some with an atomic mass of 37 amu (17 protons and 20 neutrons).

Hope it helped!!!

:

Protons :17
Neutrons:17
Electrons:17
Atomic number:17
Atomic mass:(protons +neutrons) 17+17=34

If you were an Amazon ant, how would you eat?
a. You would cultivate a special fungus
b. You would feed off the nectar produced by caterpillars
c. You would consume the pheromones produced by
other ants
d. You would be fed by "slave" ants from other species

Answers

Answer:

A

Explanation:

you have make your own cultivation so that you will no any else where for food

During the process of photosynthesis, green plants produce...
(1) sunlight
(3) nitrogen
(2) methane
(4) sugar

Answers

Answer:

4

Explanation:

Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel

How are gay marriaged babys made to be biological?

Answers

Answer:

if its a couple with a trans man (female to male) they can have a baby if they havent had surgery.

a trans woman (male to female) can also have a biological baby with a woman if they havent had surgery.

They could also have had a baby in a past relationship though it wont be biological to the other parent.

WILL GIVE BRANLIEST. 30 POINTS

Explain the three ways genetic variation can occur in a population. ​

Answers

1. caused by mutation
2. random mating
3.random fertilization
4.recombination between homologous chromosomes during meiosis
hope this helps!

2. Which atom in the water molecule is negatively charged?

Answers

Answer:

oxygen atom

Explanation:

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.

Answer:

The oxygen

Hydrogen is positive

Explanation:

Fill in the blanks the world banks the word bank is on the picture provided below :)

Answers

Answer:

1 is pioneer species 2 is limiting factor 3 is ecological succession

Explanation:

Answer:

1) pioneer

2) limiting factor

3) ecological succession

Describe the basic structure of the cell membrane with regard to specific molecules. What is it made out of?

Answers

Answer: The cell membrane is made up of phospholipids and the overall name is the Phospholipid bi-layer

Explanation:

The cell membrane has two rows of phospholipids.  A phospholipid is broken into two parts, the heads and tails.  The heads are hydrophilic (water-loving) and point to the outside and inside regions making the inner and outer wall, while the tails are hydrophobic (water-hating) and face each other to make the inside of the membrane.  There are also molecules of cholesterol and proteins throughout the membrane.

Phospholipids are the building blocks of a cell membrane. A single phospholipid molecule consists of two ends: the head and the tail.

What are phospholipids?

Phospholipids are amphiphilic molecules with both hydrophobic and hydrophilic fatty acid chains.

They are found in all living organisms as the primary components of cell membranes. Nature contains a variety of phospholipid classes with varying polar moieties.

Phospholipids are glycerol esters, fatty acid esters, phosphoric acid esters, and other alcohol esters.

Phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylserine are the most common phospholipids.

The phospholipid bilayer, which forms a stable barrier between two aqueous compartments, is the membrane's fundamental structure.

These compartments are the inside and outside of the cell in the case of the plasma membrane.

Thus, this is the basic structure of the cell membrane with regard to specific molecules.

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The predominant plants found in the savanna are grasses, and there are only a few isolated or small clusters of trees. Which abiotic factor helps to maintain the savanna as a grassland rather than a forest?
A Loose Soil
B Abundant rainfall
C warm temperatures
D lightning Fires
PLEASE HELP

Answers

A if I am correct ...…...................

Loose soil is the abiotic factor which helps to maintain the savanna as a grassland rather than a forest. Thus, the correct option is A.

What are abiotic factors?

Abiotic factors are those components of the ecosystem which are non-living. Abiotic factors include soil, temperature, rainfall, fire, etc.

Savanna is a biome which contain predominantly grasses with a few isolated or small clusters of trees in the ecosystem. The loose soil in this biome is mainly responsible for maintaining savanna as a grassland rather than a typical forest.

Loose soil is an abiotic factor which is responsible for the forestation of an ecosystem. It is difficult for the big trees to hold the loose soil whereas the grass have their perennating organs protected below the surface of the soil. Thus, they are favored in the savanna biome.

Therefore, the correct option is A.

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Which of the following has the highest reproductive potential?
O a. bacteria
O b. cattle
O c. humans
O d. elephants

Answers

Answer:

A. Bacteria

Explanation:

I asked my teacher hahahahahahahaha

Bacteria as the highest reproductive potential. Hence option a is correct.

What is reproductive potential?

Reproductive potential is defined as the proportional ability of a species to reproduce itself under ideal circumstances. The maximum number of children that a particular organism can produce is known as its reproductive potential. Compared to other species, some have substantially higher reproductive capacity.

When people reproduce more frequently, sooner in life, and at higher rates, their reproductive potential rises. The largest influence on reproductive capacity is early pregnancy. Every living thing must be able to reproduce. All living things produce additional organisms that resemble them.

Thus, bacteria as the highest reproductive potential. Hence option a is correct.

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Please help ASAP!
How would a cell wall aid a plant during a period of heavy or prolonged rainfall?

Answers

Answer:

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against stress

Explanation:

The cell wall aid a plant during a period of heavy or prolonged rainfall by providing structural support, prevents water damage, regulates water uptake and maintains turgor pressure.

What is a cell wall?

Cell wall is the outermost covering of the cell above the plasma membrane, which plays an important role in helping the plant survive during periods of heavy rainfall and prolonged rainfall.

The ways in which it provides protection are:

Structural support- It provides necessary strength and rigidity to the plant, which helps it to stand upright and not collapse under the weight of water.Prevents water damage- It acts as a barrier by preventing water from entering the cells and causing damage to the plant internal structure.Regulates water uptake- It controls the flow of water into the plant, which helps regulate the water uptake and prevent the plant from taking in too much water.Maintains turgor pressure- It also helps to maintain turgor pressure.

Hence, the cell wall provides significant support and protection for the plant during periods of heavy and prolonged rainfall.

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1. What does H.I.P.P.O. stand for? Habitat destruction, Invasive species, pollution, population Increase and
over population
over production
over use
over exploitation

Answers

Human,increase population and Overharvesting

Which generalization can be made from the data in the table?
1.The higher the temperature, the fewer chirps there will be in 10 seconds.
2.The chirps occur closer together as the temperature increases.
3.The chirps become farther apart as the temperature increases.
4.There is no relationship between temperature and the time between chirps.

Answers

I think it's the third one. But I'm not sure. Hope this helps

The generalization that can be made is: 2.The chirps occur closer together as the temperature increases.

Generalization is a statement you state after making an inference from an observation. For example, we can make a generalization by observing or analyzing the data from the experiment conducted which are given in the table.

From the table given, there seems to be a trend that can be observed. Temperature seems to influence the number of seconds between each chirp of the cricket.

A closer observation of the trend from the data given shows that in general, as the temperature was increased, the seconds between chirps seem to shorten.

Therefore, we make a generalization stating that: "2.The chirps occur closer together as the temperature increases."

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ILL GIVE U BRAINLYIST

Answers

Answer:

D.

Explanation:

That is where it demonstrates how the word is said. it's easy to identify this because the pronunciation always comes right after the word itself in the definition.

Answer:hbhh

FffcffExplanation:

Why type of cells in your body are created through the cell cycle and mitosis?​

Answers

Mitosis is a way of making more cells that are genetically the same as the parent cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged. Hope I helped! ^^

__________________________________________________________

有糸分裂は、親細胞と遺伝的に同じであるより多くの細胞を作る方法です。それは胚の発達において重要な役割を果たしており、私たちの体の成長と発達にとっても重要です。有糸分裂は新しい細胞を生成し、古い、失われた、または損傷した細胞を置き換えます。私が助けてくれたらいいのに! ^^

The daughter cells from mitosis are called diploid cells. Diploid cells have two complete sets of chromosomes. Since the daughter cells have exact copies of their parent cell's DNA, no genetic diversity is created through mitosis in normal healthy cells.

Your body uses feedback mechanisms to help maintain a stable internal environment called homeostasis. Changes can come from outside or inside the body and the body must respond to these adverse changes to return to a steady state. One such example is what happens when you go for a run on a hot summer day and your body temperature increases. According to the diagram, one of the mechanisms used to cool down is vasodilation. Similar mechanisms are also used when your body temperature drops due to a cold environment. Which of these would NOT help return a body to homeostasis by increasing body temperature?
A) shivering
B) vasoconstriction
C) muscles contract
D) increasing blood pressure

Answers

Answer:

Option D increasing blood pressure.

Explanation:

Increasing blood pressure

What is feedback mechanism in homeostasis?

Homeostasis is generally maintained by a negative feedback loop that includes a stimulus , sensor , control center , and effector . Negative feedback serves to reduce an excessive response and to keep a variable within the normal range.

What are the two feedback mechanisms which work to maintain homeostasis?

Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points. In contrast to negative feedback loops, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.

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When alleles are neither dominant or recessive, so both alleles are expressed, is
called what?
I

Answers

Answer:

hmoocigtoos

Explanation:

homocigotios

most common type of arch, loop and whorl?

Answers

Answer:

yes

Explanation:

most common pattern being found in 65 to 70 percent of all fingerprints

What happens during translation?
a. Messenger RNA is made from a DNA code.
b. The cell uses a messenger RNA code to
make proteins.
c. Transfer RNA is made from a messenger
RNA code.
d. Copies of DNA molecules are made.

Answers

The cell uses mRNA to code new proteins

Crocuses can bloom in the winter, while dahlias bloom in the fall. This is due to different responses to daylight length or _________.
A. Sun rays
B. Photoperiodism
C. phototropism
D. geotropism

Answers

Answer:

It's becoz of sun rays.....

How many total ATOMS are represented?

2Fe(NO3)2

Answers

i think 2 atoms

one is 2Fe

second is NO3

What makes echinoderms unique to all other animals? (think of systems/structures they
have that no other animal has!)

Answers

Although these spines may look like components of an exoskeleton at first glance, echinoderms do not have an exoskeleton. This is partly due to their symmetry and their spiny endoskeleton.

I don’t understand this so please help

Answers

Answer:

all I see is dots lines and circles

Explanation:

Global measurements indicate that, in the late 2000s, sea levels steadily rose. Rising sea
levels lead to the migration of marshlands further inland. The environmental changes
caused by rising sea levels have the potential to?
O increase the stability of marsh habitats.
decrease the stability of marsh habitats.
O increase the biodiversity of organisms in marsh habitats.
alternately increase and decrease the biodiversity of marsh habitats.

Answers

Answer:

My Game is José Fernando Tengo 12 YEARS OLD

The environmental changes caused by rising sea levels have the potential to alternately increase and decrease the biodiversity of marsh habitats.

What is Biodiversity?

Sum total of all the varieties of living organisms in a particular space, is known as its biodiversity.

As the sea levels steadily rose, it will firstly increase the biodiversity of marsh habitats, but sea level constantly rising, will affect its biodiversity, and organism that is native to marshy habitat should be eliminated while those organisms that are able to survive in inland habitat will migrate into it, overall causing the decrease meant of biodiversity of marshy habitat.

Therefore, the environmental changes caused by rising sea levels have the potential to alternately increase and decrease the biodiversity of marsh habitats.

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How many valence electrons does this atom have? How do you know?

Answers

Answer:

5 valence electrons

Explanation:

valence electrons are the electrons at the ends of atom or in the valence cell. so there are 5 valence electrons.

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