Question

How many type of gametes are found in F${}_1$ progeny of cross between AABBCC and aabbcc?

• A. 3
• B. 8
• C. 27
• D. 64

Answer 1

The correct option is B 8

A cross between AABBCC and aabbcc genotypes produces F${}_1$ hybrid with AaBbCc genotype. Total number of types of gamete produce by an organism is 2${}^n$, where n is the number of heterozygous genes present. The hybrid AaBbCc is heterozygous for three genes, thus total possible gametes by it = 2${}^3$=8. The gametes produced by AaBbCc are "ABC, ABc, AbC, aBC, abC, aBc, abc and Abc". Correct answer is B.