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luda_lava [24]
3 years ago
14

Mutations in the genes for clotting factor VIII and IX cause hemophilia A and B, respectively. A woman may be heterozygous for m

utations in both genes, with a mutated factor VIII allele on one X chromosome, and a mutated factor IX allele on the other. All of her sons should have either hemophilia A or B. However, on rare occasions, one of these women gives birth to a son who does not have hemophilia, and his one X chromosome does not have either mutated allele. Explain.
Biology
1 answer:
JulsSmile [24]3 years ago
6 0

Answer:

How do you want me to answer this

Explanation:

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Typically, acetylation of histone tails leads to ________. Typically, acetylation of histone tails leads to ________. relaxed pa
ololo11 [35]

Answer:

relaxed packaging of the chromatin and increased transcription.

Explanation:

Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.

A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Basically, nucleotide comprises of the following parts;

1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.

2. A phosphate group.

3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.

The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;

I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.

II. Phosphate: this is the structural backbone that provides support to DNA.

Histones are a group of highly basic proteins that are mainly associated with deoxyribonucleic acid (DNA) in the nucleus of a living organism and are responsible for condensing it to chromatin.

Typically, acetylation of histone tails leads to relaxed packaging of the chromatin and increased transcription.

Transcription can be defined as a process which typically involves re-writing the informations contained within a Deoxyribonucleic Acid (DNA) into a Ribonucleic Acid (RNA) by enzyme RNA polymerase.

6 0
3 years ago
Which best explains how Ivanovski’s work led to a change in the germ theory?
hichkok12 [17]
The best option is B He used a new experimental method to test his hypothesis. 
4 0
2 years ago
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You ate some contaminated shellfish and have developed a hepatitis a infection. your physician injects you with gamma globulin w
Volgvan
Artificial passive immunity. 
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2 years ago
When testing the effect of penicillin on the growth of E. coli, penicillin would be considered the? A.independent variable B. de
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A. It’s the thing you change and you’ll measure the E. coli growth
7 0
2 years ago
It has been found that b-dicarbonyl compounds have a greater concentration of the enol form over the keto form. this can be expl
coldgirl [10]
It is found that more than beta dicarbonyl compounds have more than 75 % concentration in Enol form and remaining in Keto form.

Reason:
             This excess of Enol form can be explained due to extra stability of this isomer. It is found that the enol form is being stabilized by the interamolecular interactions i.e. Hydrogen bonding between the hydroxyl group (acting as Hydrogen Bond Donor) and Carbonyl Oxygen (Hydrogen Bond Acceptor).

3 0
2 years ago
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