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BIO 101 BIO 101 Past Questions Objective Question
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Question

What is meant by a test cross?
Options
A A cross between an individual with an unknown genotype and a homozygous recessive
Correct Answer
B A cross between two heterozygotes
C A cross between dominant individuals
D A cross that tests gamete compatibility
Correct Answer

Option A is the correct answer.

Detailed Explanation

A test cross is used to determine the genotype of an individual showing a dominant phenotype. The individual is crossed with a homozygous recessive individual. The offspring phenotypes reveal whether the tested individual is homozygous dominant or heterozygous.

Hint

It 'tests' the unknown genotype by crossing it with a known recessive.

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 898 of 2556
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