Get Answers to all your Questions

header-bg qa

The genotype of a plant showing the dominant phenotype can be determined by

Option: 1

Back cross


Option: 2

Test cross


Option: 3

Dihybrid cross


Option: 4

Pedigree analysis


Answers (1)

best_answer


The correct option is Option 2) Test cross.

A test cross is a genetic cross between an individual showing the dominant phenotype (but with an unknown genotype) and an individual with the homozygous recessive genotype. The purpose of the test cross is to determine the genotype of the individual with the dominant phenotype.

By crossing the individual of unknown genotype with a known homozygous recessive individual, the phenotype of the offspring can reveal the genotype of the parent with the dominant phenotype. If the individual with the dominant phenotype is homozygous dominant (genotype AA), all the offspring in the test cross will show the dominant phenotype. However, if the individual with the dominant phenotype is heterozygous (genotype Aa), approximately half of the offspring will show the dominant phenotype, and the other half will show the recessive phenotype.

Posted by

seema garhwal

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks