alleryIn humans, the sex-determination mechanism is:
AZW type with female heterogamety
BXY type with male heterogamety (males XY, females XX)
CHaplodiploid
DXO type (males XO, females XX)
Answer & Solution
Correct answer: B. XY type with male heterogamety (males XY, females XX)
**Humans (and Drosophila):** **XY type, male heterogamety**.
Males XY produce X- and Y-bearing sperm
females XX produce only X eggs.
So the **father determines the sex** of the offspring.
Keep practising Unit 7A: Natural Selection & Evolutionary Mechanisms
Browse all Unit 7A: Natural Selection & Evolutionary Mechanisms questions for AP Biology, or explore more Biology topics.
Related questions
NEET · Biology · Whittaker's Five KingdomsDown's syndrome is caused by:β-Thalassemia is controlled by which gene?Sickle-cell anaemia is a:Which of the following is a mutagen?In grasshopper, the sex-determination mechanism is:The ABO blood-group gene (I) has how many alleles in the human population?Mendel's Law of Independent Assortment is best illustrated by the F₂ phenotypic ratio of: