Question Detail

BIO 201 Genetics 1 Objective Question
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Question

Why are mitochondrial traits transmitted exclusively through the maternal lineage?
Options
A Paternal mitochondria are selectively enhanced by the egg cytoplasm
B The fertilizing sperm typically contributes only its nuclear genome; nearly all zygotic cytoplasm and organelles derive from the ovum
Correct Answer
C Mitochondrial DNA is degraded by nuclear DNA in the male gamete prior to meiosis
D Mitochondrial genes are silenced by genomic imprinting in females
Correct Answer

Option B is the correct answer.

Detailed Explanation

The ovum contributes virtually all the cytoplasm and organelles to the zygote, resulting in strictly maternal inheritance of mitochondrial genes.

Hint

No hint available

Question Info

Course: BIO 201
Topic: Genetics 1
Type: Objective
Difficulty: Not specified
Question 234 of 285
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