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Mendelian and Post Mendelian Genetics Quiz | Mendelian and Post Mendelian Genetics Multiple Choice Questions and Answers

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Questions
1 A gene pair hides the effect of another. The phenomenon is
A epitasis
B dominance
C mutation
D none of these

Answer: epitasis
2 In a cross between AABB x aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be
A 9 : 3 : 3 : 1
B 2 : 1 : 1 : 2
C 1 : 2 : 2 : 1
D 7 : 5 : 3 : 1

Answer: 1 : 2 : 2 : 1
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3 Segregation of Mendelian factors (no linkage, no crossing over) occurs during
A anaphase I
B anaphase II
C diplotene
D metaphase I.

Answer: anaphase I
4 An organism with two identical alleles is
A dominant
B hybrid
C heterozygous
D homozygous

Answer: homozygous
5 A man of A-blood group marries women of AB blood group. Which type of progeny would indicate that man is heterozygous A?
A AB
B A
C O
D B.

Answer: B.
6 Multiple alleles control inheritance of
A phenylketonuria
B colour blindness
C sickle cell anaemia
D blood groups

Answer: blood groups
7 First geneticist/father of genetics was
A De Vries
B Mendel
C Darwin
D Morgan

Answer: Mendel
8 Mendel’s last law is
A segregation
B dominance
C independent assortment
D polygenic inheritance

Answer: independent assortment
9 A dihybrid condition is
A segregation
B dominance
C independent assortment
D polygenic inheritance

Answer: polygenic inheritance
10 Blue eye colour is recessive to brown eye colour. A brown eyed man whose mother was blue eyed marries a blue-eyed woman. The children will be
A both blue eyed and brown eyed 1 : 1
B all brown eyed
C all blue eyed
D blue eyed and brown eyed 3:1.

Answer: both blue eyed and brown eyed 1 : 1
11 The allele which is unable to express its effect in the presence of another is called
A co dominant
B supplementary
C complementary
D recessive

Answer: recessive
12 RR (Red) Antirrhinum is crossed with white (WW) one. Offspring RW are pink. This is an example of
A dominant-recessive
B incomplete dominance
C hybrid
D supplementary genes

Answer: incomplete dominance
13 Cross between AaBB and aaBB will form
A 1 AaBB : laaBB
B All AaBB
C 3AaBB : laaBB
D 1 AaBB : 3aaBB

Answer: 1 AaBB : laaBB
14 In a genetic cross having recessive epistasis, F2 phenotypic ratio would be
A 9:6:1
B 15 : 1
C 9 : 3 : 4
D 12 : 3 : 1

Answer: 9 : 3 : 4
15 ABO blood group system is due to
A Multifactor inheritance
B Incomplete dominance
C Multiple allelism
D Epistasis

Answer: Multiple allelism
16 tt mates with Tt. What will be characteristic of offspring?
A 75% recessive
B 50% recessive
C 25% recessive
D All dominant

Answer: 50% recessive
17 A normal green male Maize is crossed with albino female. The progeny is albino because
A trait for a albinism is dominant
B the albinos have biochemical to destroy plastids derived from green male
C plastids are inherited from female parent
D green plastids of male mus. have mutated.

Answer: plastids are inherited from female parent
18 Two linked genes a and b show 20% recombination, the individuals of a dihybrid cross between ++/+ + x ab/ab shall show gametes
A ++ 80 : ab : 20
B ++ 50 : ab : 50
C ++ 40 : ab 40 : + a 10 : + b : 10
D ++ 30 : ab 30 : + a 20 : + b : 20

Answer: ++ 40 : ab 40 : + a 10 : + b : 10
19 Which contribute to the success of Mendel?
A qualitative analysis of data
B observation of distinct inherited traits
C his knowledge of biology
D consideration of one character at one time.

Answer: his knowledge of biology
20 An allele is dominant if it is expressed in
A both homozygous and heterozygous states
B second generation
C heterozygous combination
D homozygous combination

Answer: both homozygous and heterozygous states
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