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ioda
3 years ago
15

Which mutation is more dangerous the BRCA1 BRCA2 explain your reasoning​

Biology
1 answer:
kumpel [21]3 years ago
4 0

Answer:

Abnormal BRCA1 and BRCA2 genes are found in 5% to 10% of all breast cancer cases in the United States. A study found that women with an abnormal BRCA1 gene had a worse prognosis than women with an abnormal BRCA2 gene 5 years after diagnosis.

Explanation:

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Savatey [412]
The answer would be appropriately shaped receptors
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3 years ago
When neurons "fire," the first thing that happens is that sodium ions enter the cell. this does not require an input of energy.
Karo-lina-s [1.5K]

Answer;

One can infer that membrane transport proteins are required in order for neurons to fire.

Explanation;

Transport proteins are proteins that transport substances across biological membranes. Transport proteins are found within the membrane itself, where they form a channel, or a carrying mechanism, to allow their substrate to pass from one side to the other.

-Transport proteins transport materials such as; ions such as sodium and potassium; sugars such as glucose; proteins and messenger molecules; and many more. In neurons, they  play a fundamental role in the functioning of nerve cells. These transporters, a third class of membrane transport proteins, move a wide variety of ions and molecules across cell membranes.

5 0
2 years ago
GIVING BRAINLIEST
Tomtit [17]
B is the answer. Typing more bc character limit
6 0
2 years ago
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When chiasmata can first be seen in cells using a microscope, which of the following processes has most likely occurred? the sep
Elina [12.6K]

When chiasmata can first be seen in cells using a microscope, the following processes has most likely occurred in prophase I.

<h3>When chiasmata can first be seen in cells using a microscope?</h3>

Recombination can occur at any two chromatids within this tetrad structure.

Crossovers between homologous chromatids can be visualized in structures known as chiasmata, which appear late in prophase I.

Thus, option "C" is correct, Prophase I.

To learn more about prophase I click here:

brainly.com/question/4137695

#SPJ1

3 0
2 years ago
What is the significance of chromosomes crossing over during the prophase stage of meiosis?
Fittoniya [83]
Well, when chromosomes cross over during prophase 1 of meiosis, the homologous pair of chromosomes exchange segments of DNA which happen to be the genes. So the significance of crossing-over during prophase 1 is that it adds genetic variation to sexually reproducing organisms.
7 0
3 years ago
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