Principles of Inheritance and Variation
NEET / Biology / Botany / 175 questions
BiologyBotany175 PYQs
Practice 175 NEET Biology questions from Principles of Inheritance and Variation. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
175
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Biology / Botany
2000-2026
Year Range
Based on indexed question metadata
44
Last 5 Years
2022-2026
64
Last 10 Years
2017-2026
Recent Year Trend
2021
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MCQ100%
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#2 Easy7
#3 Medium1
44 in last 5 years64 in last 10 years
Principles of Inheritance and Variation Questions
Showing 25 of 175 questions on this page.
1Principles Of Inheritance And Variation
Which one of the following traits of garden pea
studied by Mendel was a recessive feature ?
studied by Mendel was a recessive feature ?
MCQ+4 / -12003
2Principles Of Inheritance And Variation
Down's syndrome is caused by an extra copy of
chromosome number 21. What percentage of
offspring produced by an affected mother and a
normal father would be affected by this disorder ?
chromosome number 21. What percentage of
offspring produced by an affected mother and a
normal father would be affected by this disorder ?
MCQ+4 / -12003
3Principles Of Inheritance And Variation
Pattern baldness, moustaches and beard in
human males are examples of : -
human males are examples of : -
MCQ+4 / -12003
4Principles Of Inheritance And Variation
In Drosophila, the sex is determined by : -
MCQ+4 / -12003
5Principles Of Inheritance And Variation
The genes controlling the seven pea characters
studied by Mendel are now known to be located
on how many different chromosomes ?
studied by Mendel are now known to be located
on how many different chromosomes ?
MCQ+4 / -12003
6Principles Of Inheritance And Variation
On selfing a plant of F1 generation with
genotype “AABbCC”,the genotypic ratio in
F2 generation will be
genotype “AABbCC”,the genotypic ratio in
F2 generation will be
MCQ+4 / -12002
7Principles Of Inheritance And Variation
A diseased man marries a normal woman. They
get three daughter and five sons. All the
daughter were diseased and sons were normal.
The gene of this disease is : -
get three daughter and five sons. All the
daughter were diseased and sons were normal.
The gene of this disease is : -
MCQ+4 / -12002
8Principles Of Inheritance And Variation
Which of the following is the example of
pleiotropy ?
pleiotropy ?
MCQ+4 / -12002
9Principles Of Inheritance And Variation
A gene said to be dominant if : -
MCQ+4 / -12002
10Principles Of Inheritance And Variation
There are three genes a, b and c. The percentage
of crossing over between a and b is 20%, b and c
is 28% and a and c is 8%. What is the sequence
of genes on chromosome
of crossing over between a and b is 20%, b and c
is 28% and a and c is 8%. What is the sequence
of genes on chromosome
MCQ+4 / -12002
11Principles Of Inheritance And Variation
Which of the following is a correct match -
MCQ+4 / -12002
12Principles Of Inheritance And Variation
When dominant and recessive allels express
itself together it is called : -
itself together it is called : -
MCQ+4 / -12001
13Principles Of Inheritance And Variation
Independent assortment of genes does not takes
place when : -
place when : -
MCQ+4 / -12001
14Principles Of Inheritance And Variation
Number of Barr bodies in XXXX female is
MCQ+4 / -12001
15Principles Of Inheritance And Variation
Two nonallelic genes produces the new
phenotype when present together but fail to do so
independently then it is called : -
phenotype when present together but fail to do so
independently then it is called : -
MCQ+4 / -12001
16Principles Of Inheritance And Variation
Ratio of complementry genes is : -
MCQ+4 / -12001
17Principles Of Inheritance And Variation
Male XX and female XY sometime occur due to
MCQ+4 / -12001
18Principles Of Inheritance And Variation
A and B genes are linked. What shall be
genotype of progeny in a cross between AB/ab
and ab/ab : -
genotype of progeny in a cross between AB/ab
and ab/ab : -
MCQ+4 / -12001
19Principles Of Inheritance And Variation
Sickle cell anaemia is induce to : -
MCQ+4 / -12001
20Principles Of Inheritance And Variation
Probability of four son to a couple is : -
MCQ+4 / -12001
21Principles Of Inheritance And Variation
In Drosophila the XXY condition leads to
femaleness whereas in human beings the same
condition leads to Klienfelter's syndrome in
male. It proves :
femaleness whereas in human beings the same
condition leads to Klienfelter's syndrome in
male. It proves :
MCQ+4 / -12000
22Principles Of Inheritance And Variation
According to mendelism which character is
showing dominance ?
showing dominance ?
MCQ+4 / -12000
23Principles Of Inheritance And Variation
Mongolian idiots are due to trisomy in 21st
chromosome is called :
chromosome is called :
MCQ+4 / -12000
24Principles Of Inheritance And Variation
Erythroblastosis foetalis is caused when :
MCQ+4 / -12000
25Principles Of Inheritance And Variation
Due to the cross between TTRr × ttrr the
resultant progenies showed how many percent
plants tall, red flowered :
resultant progenies showed how many percent
plants tall, red flowered :
MCQ+4 / -12000
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