Question

question 87
the diploid first cell of a new organism is a:
a zygote
b gamete
c polar body
d oogonium
e morula

Explanation:

To solve this, we analyze each option:

• Option A: A zygote is formed by the fusion of a sperm (haploid) and an egg (haploid), resulting in a diploid cell that is the first cell of a new organism.
• Option B: Gametes (sperm and egg) are haploid, not diploid, so this is incorrect.
• Option C: Polar bodies are small, non - functional cells produced during oogenesis and are haploid, so this is wrong.
• Option D: Oogonium is a diploid cell in the ovary, but it is not the first cell of a new organism (it is involved in gamete production), so this is incorrect.
• Option E: Morula is a stage of early embryonic development, consisting of multiple cells, and is not the first cell of a new organism, so this is wrong.

Answer:

A. Zygote