1
IAT (IISER) 2025
MCQ (Single Correct Answer)
+4
-1

Two double heterozygous plants ( PpQq ), derived from two different pairs of true-breeding parents of unknown genotype, produce gametes in the proportions as given below.

IAT (IISER) 2025 Biology - Principles of Inheritance and Variation Question 1 EnglishWhich one of the following options correctly represents the genotype of the parents?

A

$$ \mathrm{R} 1=\mathrm{ppQQ} ; \mathrm{R} 2=\mathrm{PPqq} ; \mathrm{R} 3=\mathrm{PPQQ} ; \mathrm{R} 4=\mathrm{ppqq} $$

B

$$ \mathrm{R} 1=\mathrm{PPQQ} ; \mathrm{R} 2=\mathrm{ppqq} ; \mathrm{R} 3=\mathrm{ppQQ} ; \mathrm{R} 4=\mathrm{PPqq} $$

C

$$ \mathrm{R} 1=\mathrm{ppQQ} ; \mathrm{R} 2=\mathrm{PPqq} ; \mathrm{R} 3=\mathrm{PPqq} ; \mathrm{R} 4=\mathrm{ppQQ} $$

D

$$ \mathrm{R} 1=\mathrm{PPQQ} ; \mathrm{R} 2=\mathrm{ppqq} ; \mathrm{R} 3=\mathrm{ppqq} ; \mathrm{R} 4=\mathrm{PPQQ} $$

2
IAT (IISER) 2025
MCQ (Single Correct Answer)
+4
-1

Honey bee males are haploid and females are diploid. Which one of the following statements is INCORRECT about honey bees?

A

Honey bee males cannot have daughters but can have sons.

B

Honey bee males are produced from unfertilized eggs and females are produced from fertilized eggs.

C

A honey bee male does not have a father but has a grandfather.

D

Honey bee males form gametes by mitosis and females form gametes by meiosis.

3
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1
The following pedigree diagram shows the inheritance of a rare genetic disorder (filled shapes depict affected individuals). IAT (IISER) 2024 Biology - Principles of Inheritance and Variation Question 9 English Which of the following is the most likely pattern of inheritance of the disorder?
A
X-linked recessive
B
X-linked dominant
C
Autosomal recessive
D
Autosomal dominant
4
IAT (IISER) 2023
MCQ (Single Correct Answer)
+4
-1
In an island with 10,000 individuals, four have sickle cell anemia, a recessive autosomal disease. Assuming that the locus is in Hardy-Weinberg equilibrium, how many individuals in that island are expected to be heterozygous for the disease allele?
A
4
B
9608
C
9996
D
392

IAT (IISER) Subjects

Browse all chapters by subject