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Mayil Academy - Principles of inheritance and Variations

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Column A --------------------------Column B

I. Gregor Mendel -------------A. Chromosomal theory of Inheritance

II. Sutton and Boveri -------------B. Law of Inheritance

III.Henking ----------------------C. Mendelian disorder

IV. Thalassemia -----------------D. Discovered x-body

The correct match is –

a)

I – B, II – A, III – D, IV – C

b)

I – D, II – A, III – B, IV – C

c)

I – D, II – B, III – A, IV – C

d)

I – B, II – C, III – D, IV – A

2.

Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental or coupling type along with its cross over or repulsion:

a)

Coupling aaBB, aabb; Repulsion AABB, aabb

b)

Coupling AABB, aabb; Repulsion AABB, AAbb

c)

Coupling AAbb, aaBB; Repulsion AaBb, aabb

d)

Coupling AABB, aabb; Repulsion AAbb, aaBB

3.

Which of the following is suitable for experiments on linkage?

a)

AABB x aabb

b)

AaBb x AaBb

c)

aaBB x aaBB

d)

AAbb x AaBB

4.

The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were

a)

1

b)

2

c)

3

d)

4

5.

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of :

a)

Co-dominance

b)

Dihybrid cross

c)

Monohybrid cross with complete dominance

d)

Monohybrid cross with incomplete dominance

6.

What is the ratio of one pair of contrasting character in F2 of a dihybrid ratio.

a)

3 : 1

b)

9 : 3 : 3 : 1

c)

5 : 3

d)

1 : 2 : 2 : 4 : 1 : 2 : 1 : 2 : 1

7.

Theoretically, the modified allele could be responsible for the production of

I. the normal / less efficient enzyme

II. a non-functional enzyme

III. no enzyme at all

a)

I and II are correct

b)

I and III are correct

c)

I, II and III are correct

d)

II and III are correct

8.

What map unit (Centimorgan) is adopted in the construction of genetic maps?

a)

A unit of distance between two expressed genes representing 10% cross over.

b)

A unit of distance between two expressed genes representing 100% cross over.

c)

A unit of distance between genes on chromosomes, representing 1% cross over.

d)

A unit of distance between genes on chromosomes, representing 50% cross over.

9.

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following :

a)

This experiment does not follow the Principle of Dominance.

b)

Pink colour in F1 is due to incomplete dominance.

c)

Ratio of F2 is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)

d)

Law of Segregation does not apply in this experiment

10.

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :

a)

T.H. Morgan

b)

Gregor J. Mendel

c)

Alfred Sturtevant

d)

Sutton Boveri

11.

WHO IS THE FATHER OF GENETICS?

a)

ALFRED STURTEVANT

b)

GREGOR JOHAN MENDEL

c)

TSCHERMAK

d)

T H MORGAN

12.

IN THE TEST CROSS

a)

UNKNOWN HYBRID IS CROSSED WITH HOMOZYGOUS DOMINANT PARENT

b)

UNKNOWN HYBRID IS CROSSED WITH HETEROZYGOUS PARENT

c)

UNKNOWN HYBRID IS CROSSED WITH HOMOZYGOUS RECESSIVE PARENT

d)

NONE OF THE ABOVE

13.

T H MORGAN EXPERIMENTALLY VERIFIED CHROMOSOMAL THEORY OF INHERITANCE BY USING Drosophila melanogaster BECAUSE

a)

IT COMPLETES ITS LIFE CYCLE IN ABOUT TWO WEEKS

b)

IT PRODUCES LARGE NUMBER OF PROGENIES IN SINGLE MATING

c)

MALE IS DISTINCT FROM FEMALE

d)

ALL OF THE ABOVE

14.

IN Mirabilis jalapa WHEN THE PLANT WITH RED FLOWER CROSSED WITH THAT OF WHITE FLOWER F1 HYBRIDS SHOW FLOWERS WITH PINK COLOUR ,THIS IS DUE TO

a)

MENDELIAN DOMINANCE

b)

CODOMINANCE

c)

INCOMPLETE DOMINANCE

d)

ALL OF THE ABOVE

15.

THERE ARE 6 GENOTYPES TO REPRESENT 4 BLOOD GROUPS IN HUMAN BEINGS.WHICH ONE OF THE FOLLOWING GENOTYPES SHOWS CODOMINANCE

a)

IAIA

b)

IBIB

c)

IAI

d)

IAIB

16.

IN THIS IMAGE WHICH CROSS SHOWS HIGH DEGREE OF RECOMBINATION

a)

FIRST CROSS

b)

SECOND CROSS

c)

BOTH

d)

NONE OF THESE

17.

WHEN A MAN WITH BLOOD A GETS MARRIED TO A WOMAN WITH BLOOD GROUP B ,THEN THEIR FIRST CHILD HAS BLOOD GROUP O.FIND OUT PROBABILITY OF OTHER BLOOD GROUPS THEIR CHILDREN.

a)

A,B,AB

b)

B,O

c)

A,O

d)

A,AB

18.

ONE TRAIT CAN BE INFLUENCED BY MORE THAN ONE GENES,THIS IS THE CASE OF

a)

PLEIOTROPY

b)

POLYGENIC INHERITANCE

c)

CODOMINANCE

d)

ALL OF THE ABOVE

19.

IF THE THE NUMBER OF CHROMOSOME IN QUEEN BEE IS 32 THEN WHAT WILL BE THE NUMBER OF CHROMOSOME IN WORKER BEE AND DRONE RESPECTIVELY?

a)

32,32

b)

32,64

c)

32,16

d)

16,32

20.

IF A PEA PLANT WITH GENOTYPE RRYy IS CROSSED WITH ANOTHER PEA PLANT WITH GENOTYPE RrYy THEN FIND OUT THE PHENOTYPIC RATIO OF F1 HYBRIDS.

a)

6:3

b)

6:2

c)

1:2:1

d)

9:3:3:1

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