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3 years ago

Please answer 5&6. Thank you.

Biology

1 answer:

erastovalidia [21]3 years ago

3 0

Answer:

5. The correct answer would be an option A. ova

Note: I assume that all the samples are of human origin.

DNA (deoxyribonucleic acid) content of somatic cells of humans consists of 46 chromosomes or 23 pairs of chromosomes. Gametes (sperm or ova) are haploid cells produced by the process of meiosis and contain half the number of chromosomes found in parent cell. Hence, they contain 23 chromosomes.

6. The correct answer would be an option J.

Sperm formation or spermatogenesis is the process by which spermatozoa (haploid gamete) is produced from germ cell with the help of meiotic division.

Meiosis results in the formation of four haploid (n) cells from single diploid (2n) parent cell. Here, 2n is given as 8 so, n would be equal to 4.

Meiosis I results in the formation of two secondary spermatocyte cells (both haploid or 4 chromosomes in this case) from single primary spermatocyte (diploid or 8 chromosome in this case).

Both the secondary spermatocytes undergo meiosis II to produce 4 spermatids (each haploid or 4 chromosome in this case). Spermatids differentiate and mature into spermatozoa.

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Explanation:

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3 years ago

Which of these changes to a modern lifestyle would promote the development of more-sustainable practices in the world food syste

dezoksy [38]

Answer:

c. switching from beef to soy

Explanation:

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3 years ago

How can a child get a chromosome that is totally different from the original chromosomes of both parents

Oduvanchick [21]

This can happen because you have recessive and dominant characteristics passed down. So you can get a totally different chromosome that doesn't come from your parents because your grandparents may have had it or great grand parents, the line keeps going .

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3 years ago

Mendel’s finding that the inheritance of one trait had no effect on the inheritance of another became known as the

Lorico [155]

Answer:

The correct answer is- law of independent assortment

Explanation:

Law of independent assortment says that assortment of one gene pair is independent of assortment of other gene pair which means each contrasting gene pair bears no association with other pairs of contrasting character and behave and segregate independently.

This allows the combination of new characters in the offspring. So it helps in increasing the genetic variability in the gene pool. Therefore law of independent assortment tells that inheritance of one trait had no effect on the inheritance of another.

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3 years ago

How are alleles segregated in sexually reproducing organisms?

Sauron [17]

Answer: sexually reproducing organisms

Explanation: In most sexually reproducing organisms, each adult has two copies of each gene--one from each parent. These genes segregate from each other when gametes are formed. Alleles for different genes usually segregate independently of each other.

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3 years ago