Question

What process can account for the phenomenon wherein a normal XY male produces a sperm carrying two Y chromosomes?
a.) first division nondisjunction
b.) disjunction
c.) second division nondisjunction
d.) copy-number variation
e.) translocation

Answer 1

Answer:

The correct answer will be option-C

Explanation:

Non-disjunction is the failure of the separation of the chromosomes during the separation phase of the division that anaphase I and anaphase II of meiosis.

The non-disjunction takes place during meiosis which takes place in the gamete formation.

A condition which develops from the non-disjunction with one extra copy of the Y chromosome is known as 47, XYY condition or Klinefelter syndrome.

This extra copy of the Y chromosome takes place when the chromosome separation failure takes place during anaphase II of meiosis II. This separation creates one extra copy of the chromosome.

Thus, Option-C is the correct answer.

Answer 2

The process that can account for the phenomenon wherein a normal XY male produces a sperm carrying two Y chromosomes is second division nondisjunction (Option c).

• Meiosis is a type of cell division by which a parental cell duplicates its genetic material (DNA) and divides twice to produce four gametic cells having half of the genetic material.

• These successive rounds of cell division are called Meiosis I and Meiosis II.

• Meiosis is a reductional type of cell division that ensures that the fusion of the gametes during fertilization generates a diploid zygote with a normal number of chromosomes.

• Second division nondisjunction occurs when sister chromatids are not separated in Anaphase II (Meiosis II), thereby one gamete receives an extra chromosome (in this case, the Y chromosome), and another gamete has a missing chromosome.

In conclusion, the process that can account for the phenomenon wherein a normal XY male produces a sperm carrying two Y chromosomes is second division nondisjunction (Option c).

Learn more in:

https://brainly.com/question/7002092