The first nation to send a man to the moon was the ____________.

1 answer:

5 0

The first nation to send a man to the moon was the United States of America. The Soviet Union was the first to land a mission on the moon, but the United States were the first to land a manned mission on the moon.

You might be interested in

Normally, this region is imprinted in the sperm, but not the egg. This means that the DNA on the ____________ copy of the chromo

Nostrana [21]

Answer: The DNA on the paternal copy of the chromosome will be methylated at the imprinting center, while the DNA on the maternal copy of the chromosome will not be methylated in this region.

Explanation:

Chromosomes are DNA structures associated with proteins such as histones. They are found in the nucleus of cells and contain genetic information for the development and functioning of an organism. Human beings are diploid, meaning that they possess two copies of each of the 23 chromosomes (a total of 46).

Gametes, which are sex cells such as the sperm (produced by the male) and the egg (produced by the female) that are haploid. This means that they possess only one chromosome of each pair. During fertilization, a male gamete fuses with a female gamete to generate a zygote, which will give rise to a new human being. This new individual will possess half of the genetic material from its father and half from its mother. Thus having a total of 46 chromosomes, 23 from each parent.

Genetic imprinting modulates gene expression by chemical modification of DNA and/or modification of chromatin structure. Often, genetic imprinting causes a gene to be expressed only on the chromosome inherited from one of the parents. One example of imprinting is DNA methylation, which is a process by which methyl groups are added to DNA. Methylation modifies DNA function when found in the promoter gene, repressing gene transcription. This means that a methylated gene will not be expressed, that is, it will not produce a protein encoded by that gene. So, if a region of DNA is imprinted in the sperm cell, the paternal chromosome inherited from this sperm will be methylated in the genes of the offspring. And the offspring will only express the maternal copy inherited, which will not be methylated.

6 0

3 years ago

What are the final products (or "outputs") of the light-independent reactions of photosynthesis? select all that apply?

Stels [109]

Outputs : Oxygen
Inputs: Sunlight;Carbon dioxide;Water

7 0

3 years ago

Why causes the high concentration of volcanic activity known as the “Ring of Fire”? Please Help EXPLAIN

omeli [17]

Because these volcanic activities happen on plate tectonics.

This is not the best answer but I hope it could help you.

3 0