Question

Which of these genotypes are of homozygous individuals?

• A. $AABBCC$
• B. $AAbbCC$
• C. $AABBcc$
• D. All of these genotypes

Answer 1

Answer: (D)

Homozygous individuals breed purely for a character. They should have the same allele for a particular character. $AAbbCC$ is homozygous dominant for $A$ , homozygous recessive for $B$ and homozygous dominant for $C$ . Thus, this organism is homozygous and will produce only one type of gamete. Similarly, $AABBCC$ and $AABBcc$ are homozygous too.