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Previous year question hub

Principles Of Inheritance And Variation - Botany - Biology Previous Year Questions

Practice Principles Of Inheritance And Variation - Botany - Biology previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

5Papers
5Years
10Questions
1Topics

Principles Of Inheritance And Variation question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Principles Of Inheritance And Variation. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 10 100%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 10 100%

Subject weightage

Top subjects by unique question coverage.

Biology
10 Qs

Most asked topics

Top topics across the included previous year papers.

Botany
10 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Principles Of Inheritance And Variation
10 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

IAT IISER 2025
2 Qs
IAT IISER 2024
1 Qs
IAT IISER 2023
2 Qs
IAT IISER 2022
4 Qs
IAT IISER 2020
1 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
IAT IISER 202520252View paper
IAT IISER 202420241View paper
IAT IISER 202320232View paper
IAT IISER 202220224View paper
IAT IISER 202020201View paper

All Principles Of Inheritance And Variation previous year questions

Practice every matching question in batches of 20, with every available option.

1
2020 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2020
A hypothetical plant species shows two flower colour phenotypes- red and white. Red is dominant over white. In a population, this flower colour locus was found to be in HardyWeinberg equilibrium. If 490 out of a total population size of 1000 plants were found to be white-flowered, how many of the red-flowered plants will be heterozygous?
A
700
B
90
C
580
D
420
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2
2022 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2022
In a cross between individuals of the genotypes PpQQRrSS and ppqqRrSS, what will be the expected number of progenies with the genotype ppQQRrSS in a population of 400 individuals, assuming independent assortment?
A
0
B
25
C
100
D
200
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3
2022 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2022
A single point mutation in gene ' $X$ ' results in breathing difficulty, hypertension as well as partial sterility. Which among the following best explains the observed phenotypes?
A
Incomplete dominance
B
Pleiotropy
C
Linkage
D
Partial dominance
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4
2022 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2022
In a given species of flowering plant, the colour of the seeds is exclusively determined by the colour of its seed coat. Seed coat colour in this species is governed by a nuclear gene with two alleles. The WHITE ( $W$ ) allele is dominant over brown ( $w$ ) allele. If a plant with brown seeds $(w w)$ is crossed as a female with pollen from a white seed $(W W)$ plant, what will be the seed colour and the genotype of the embryo in the resultant seeds obtained from this cross?
A
Brown seeds with $W w$ embryo
B
White seeds with $W w$ embryo
C
Brown seeds with ww embryo
D
White seeds with ww embryo
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5
2022 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2022
Nine percent of a population cannot taste a certain food item because of a recessive allele of the gene IAT. Assuming the population is in Hardy-Weinberg equilibrium, what will be the frequency of dominant and recessive alleles, respectively?
A
0.7 and 0.3
B
0.9 and 0.1
C
0.3 and 0.7
D
0.1 and 0.9
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6
2023 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2023
The following pedigree chart shows the inheritance of a genetic disorder. I-2 and III-2 are the only affected individuals. IAT (IISER) 2023 Biology - Principles of Inheritance and Variation Question 9 English Which one of the following is the correct pattern of inheritance of the disorder, and the genotype of the II- 3 individual?
A
Autosomal recessive, homozygous for the normal allele
B
Autosomal dominant, homozygous for the normal allele
C
X-linked recessive, heterozygous
D
Autosomal recessive, heterozygous
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7
2023 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2023
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
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8
2024 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2024
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 11 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
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9
2025 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2025

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 3 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

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

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10
2025 · Biology · Botany · Principles Of Inheritance And Variation
IAT IISER 2025

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.

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