Report a question

Time: 10 Minutes for 10 Question.

12th Biology: Principles of Inheritance and Variation

1 / 10

1. Extra nuclear chromosomes occur in

peroxisome, ribosome

chloroplast and mitochondria

mitochondria and ribosome

chloroplast and lysosome

2 / 10

2. A disease caused by an autosomal primary non-disjunction is

Down's syndrome

Klinefelter's syndrome

Turner's syndrome

3 / 10

3. The distance between the genes is measured by

angstrom

map unit

Dobson unit

millimetre

4 / 10

4. Mother and father of a person with ‘O’ blood group have ‘A’ and ‘B’ blood group respectively. What would be the genotype of both mother and father?

Both mother and father are heterozygous for ‘A’ and ‘B’ blood group, respectively

Both mother and father are homozygous for ‘A’ and ‘B’ blood group, respectively

Mother is heterozygous for ‘A’ blood group and father is homozygous for ‘B

Mother is homozygous for ‘A’ blood group and father is heterozygous for ‘B’

5 / 10

5. A polygenic inheritance in human beings is

skin colour

phenylketonuria

colourblindness

sickle cell anaemia

6 / 10

6. Multiple alleles control inheritance of

phenylketonuria

colourblindness

sickle cell anaemia

blood groups

7 / 10

7. The contrasting pairs of factors in Mendelian crosses are called

multiple alleles

allelomorphs

alloloci

paramorphs

8 / 10

8. A Across between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?

Tt and Tt

TT and Tt

TT and TT

Tt and tt

9 / 10

9. Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino ?

100%

25%

50%

75%

10 / 10

10. Sex is determined in human beings

by ovum.

at time of fertilization.

40 days after fertilization.

seventh to eight week when genitals differentiate in foetus.

Insert Full Name and email for result

Full NameEmail

Your score is

Class 12 biology Principles of Inheritance and Variation Free test quiz

Attempt Principles of Inheritance and Variation Free test quiz

Quiz Score Card

Vidyalite Team

Give Your Rating and Review