Principles of Inheritance and Variation

When a tall pea plant with round seeds was selfed, it produced the progeny of : (a) Tall plants with round seeds and (b) Tall plants with wrinkled seeds. Identify the genotype of the parent plant.

1. TtRr
2. TtRR
3. TTRR
4. TTRr

Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to : Choose the most appropriate answer from the options given below :

1. C and D only
2. D and E only
3. A and B only
4. B and C only

The mother has A+ blood group, the father has B+ and the child is A+. What can be the possibility of genotypes of all three, respectively? Choose the correct answer from the options given below:

1. C and D
2. D and A
3. A and B
4. B and E

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by

1. Sutton and Boveri
2. Alfred Sturtevant
3. Henking
4. Thomas Hunt Morgan

The phenomenon of pleiotropism refers to

1. Presence of two alleles, each of the two genes controlling a single trait
2. A single gene affecting multiple phenotypic expression
3. More than two genes affecting a single character
4. Presence of several alleles of a single gene controlling a single crossover

Which of the following statements are correct about Klinefelter’s Syndrome? Choose the correct answer from the options given below :

1. C and D only
2. B and E only
3. A and E only
4. A and B only

Broad palm with single palm crease is visible in a person suffering from-

1. Turner’s syndrome
2. Klinefelter’s syndrome
3. Thalassemia
4. Down’s syndrome

Which one of the following symbols represents mating between relatives in human pedigree analysis?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

XO type of sex determination can be found in :

1. Drosophila
2. Birds
3. Grasshoppers
4. Monkeys

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct