NEET-Style Quiz: Principles of Inheritance and Variation

Question 1 of 20

A test cross is performed to determine the genotype of a tall pea plant. The cross results in a 1:1 ratio of tall to dwarf offspring. What is the genotype of the parent tall plant?

Tt

The genotype cannot be determined from this cross.

tt

TT

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PLANT KINGDOM

LIFE CYCLE OF BRYOPHYTES 

MOSS 

 LIFE CYCLE OF 

A 

LIVERWORT 

PTERIDOPHYTA, GYMNOSPERMS AND ANGIOSPERMS 

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DIHYBRID CROSS QUESTIONS

Problem:- 1) In rabbits, gray hair is dominant to white hair. Also in rabbits, black eyes are dominant to red eyes. These letters represent the genotypes of the rabbits: Calculate the dihybrid cross ratio with the help of Punnet’s square & also describe the expected phenotypic & genotypic ratio. GG - Grey BB - Black Gg - Grey Bb - Black gg - White bb - Red 2) An aquatic arthropod called a Cyclops has antennae that are either smooth or barbed. The allele for barbs (B) is dominant over smooth (bb). In the same organism Non-resistance to pesticides (N) is dominant over resistance to pesticides (nn). Make a "key" to show all the possible genotypes (and phenotypes) of this organism.

BIOLOGICAL CLASSIFICATION

BIOLOGICAL CLASSIFICATION CLASS XI