Question

Assume non-disjunction occurs in meiosis II in oogenesis. If the resulting gametes are fertilized by normal sperm, what types of zygotes can be produced?

a) Trisomic
b) Disomic
c) Monosomic
d) Two of the above
e) All of the above

Answer 1

Non-disjunction during meiosis II in oogenesis can result in the production of trisomic and disomic zygotes when fertilized by normal sperm.

Step-by-step explanation:

When non-disjunction occurs in meiosis II in oogenesis and the resulting gametes are fertilized by normal sperm, it can lead to the production of various types of zygotes. These zygotes can be trisomic, meaning they have an extra copy of a chromosome; monosomic, meaning they lack a copy of a chromosome; or disomic, meaning they have a normal pair of chromosomes. Therefore, the correct answer is option d) Two of the above: trisomic and disomic zygotes can be produced.