ANSWER:
The correct answer is option B. heterozygous.
EXPLANATION:
A gene is a small segment that develops a certain trait. Gene can have two or more forms for the character. Such forms are called alleles. An allele can be dominant or recessive in nature. Dominant alleles mask the recessive alleles if present together.
The two same alleles called as homozygous, it can be dominant BB or recessive bb. If an individual has Bb genotype he has one allele of both the forms for characters and termed as heterozygous.
Thus, the correct answer is option B. heterozygous.
