In a test cross, an individual of unknown genotype is crossed with which of the

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Question: In a test cross, an individual of unknown genotype is crossed with which of the following? (2021)

Options:

Correct Answer: Homozygous recessive

Exam Year: 2021

Solution:

A test cross is performed by crossing an individual of unknown genotype with a homozygous recessive individual.

In a test cross, an individual of unknown genotype is crossed with which of the following? (2021)

In a test cross, an individual of unknown genotype is crossed with which of the following? (2021)

Step 1: Understand what a test cross is. A test cross is a way to determine the genotype of an individual with an unknown genotype.
Step 2: Know that the individual with the unknown genotype could be either homozygous dominant or heterozygous.
Step 3: To find out the genotype, we cross the unknown individual with a homozygous recessive individual. This means the recessive individual has two copies of the recessive allele.
Step 4: Observe the offspring from this cross. If any offspring show the dominant trait, the unknown individual must be heterozygous. If all offspring show the recessive trait, the unknown individual is homozygous dominant.

Test Cross – A genetic cross used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.