Principles of Inheritance and Variation
9 Board Biology previous year questions on Principles of Inheritance and Variation — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.
To determine the genotype of a tall plant at \({F}_{2}\), Mendel crossed the tall plant from with a dwarf plant. This is called a
Test cross
To determine the genotype of a tall plant of \({F}_{2}\) generation, Mendel crossed the tall plant from \({F}_{2}\) generation with a dwarf plant. He called this a test cross. In a typical test cross an organism (pea plants) showing a dominant phenotype whose genotype is to be detrained is crossed with the recessive parent instead of self–crossing. The progenies of such a cross can easily be analyzed to predict the genotype of the test organism.
The phenotypic and genotypic ratio is same i.e. 1:2:1 in
Options are free to see. Unlock the correct answer and full explanation with Pass.
Genes which code for a pair of contrasting traits are known as
Options are free to see. Unlock the correct answer and full explanation with Pass.
What is the pattern of inheritance for polygenic trait?
Options are free to see. Unlock the correct answer and full explanation with Pass.
More than two alternate forms of a gene present on the same locus are called as
Options are free to see. Unlock the correct answer and full explanation with Pass.
Which one of the following options will express intermediate skin colour in an individual?
Options are free to see. Unlock the correct answer and full explanation with Pass.
When the genotype of an organism contains two identical allele the organism is considered as
Options are free to see. Unlock the correct answer and full explanation with Pass.
Incomplete dominance is observed in
Options are free to see. Unlock the correct answer and full explanation with Pass.
Crosses between F_1 offspring and either of their parents are called as
Options are free to see. Unlock the correct answer and full explanation with Pass.
Practice more Board Biology PYQs
Browse every Biology chapter, or explore the full Board question bank.
🧬 All Biology chapters →