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aalyn [17]
2 years ago
11

the blood group b is almost absent in native americans, whose ancestors arrived in very small numbers about 1,000 years ago. whi

ch factor is responsible for this phenomenon
Biology
1 answer:
Andreyy892 years ago
6 0
"Founder effect" is the one factor among the choices given in the question that is responsible for this phenomenon. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.
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In humans, methylation of chromosomal DNA is a signal that often leads to
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Answer:

The correct answer will be option-formation of heterochromatin

Explanation:

Methylation of DNA is the epigenetic mechanism which controls the expression of a gene by adding a methyl group to the cytosine bases in eukaryotic DNA.

The methylation of DNA converts the cytosine residues to the  5-methylcytosine catalysed by DNA methyltransferase enzyme. This results in the silencing of the gene and transcription get switched off.

Studies have shown that DNA methylation is involved in the formation and maintenance of the heterochromatin structure which is the condensed form of the chromatin in which transcription is switched off.

Thus, the formation of heterochromatin is the correct answer.

7 0
3 years ago
A new strain of rice was developed to be resistant to popular weed killers. What could be a negative outcome from the production
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B. Because of Farm laws that require no seeds to be kept from a harvest, or you are not allowed to have plants of a different genetic make or made by a different company in your field if you didn't buy it, you could have wind carry seeds into opposing fields, and if inspected, you would potentially have to pay a fine for having unauthorized varieties growing in your field. And trying to remove it would be a pain, because you would either have to find a killer that your plants are resistant to, or to find these individually and pluck them, or to spray a killer that would kill all of your plants, but none of these resistant varieties
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Read 2 more answers
Which of these is a likely goal of scientists involved in the Human Genome Project?
oksano4ka [1.4K]

Answer:

B. to understand the function of genes that are effected by disease

Explanation:

i took the test

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What does software alone enable a computer to do?
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Answer:

It connects to the Internet. Controls processing speeds. Interacts with the user.

Explanation:

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