Advanced Placement (AP) Biology 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 490

Which of the following represents a heterozygous condition?

bb

BB

Bb

A heterozygous condition occurs when an individual has two different alleles for a particular gene. In this case, the choice that represents a heterozygous condition is "Bb," where one allele is dominant (B) and the other is recessive (b). This combination indicates that the individual has inherited different versions of the gene from each parent, which is characteristic of heterozygosity.

In contrast, the other options represent homozygous conditions, where the individual carries two identical alleles—either both dominant (BB) or both recessive (bb or AA). Thus, "Bb" is the only option that shows the presence of different alleles at the same locus, confirming its status as a heterozygous condition.

Get further explanation with Examzify DeepDiveBeta

AA

Next Question

Report this question

Download Advanced Placement (AP) Biology Practice Exam PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy