Principles of Inheritance and Variation Test

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Principles of Inheritance and Variation Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

Material used for conducting experiments on genetic traits by Mendel was

A
Pisumsativum

B
Lathyrusodaratus

C
Mirabilis jalappa

D
Oryza sativa

Solution

Mendel conduct his hybridization experiment on garden pea (Pisumsativum) using different contrasting pair of traits.
Question 2
1 / -0

Loss of one chromosome from one set is called

A
tetrasomy

B
nullisomy

C
monosomy

D
trisomy
Question 3
1 / -0

Assertion (A): In Klinefelter's syndrome, the chromosomal constitution of man is 22AA + XXY.
Reasoning (R): Few men have XX karyotype and yet are males. This is a rare phenomenon due to translocation of a small segment of Y chromosome attached to an X chromosome and is inherited in concert with X. Choose the correct option for the above statements.

A
Both Assertion and Reasoning are true and R is the correct explanation of A.

B
Both Assertion and Reasoning are true and R is not the correct explanation of A.

C
A is true and R is false.

D
Both A and R are false.

E
A is false and R is true.
Question 4
1 / -0

In which of the following crosses will the progenies obtained be fifty percent homozygous recessive and fifty percent heterozygous?

A
TT x Tt

B
Tt x Tt

C
Tt x tt

D
TT x tt
Question 5
1 / -0

The addition or deletion of one or more chromosomes in a set is called

A
euploidy

B
aneuploidy

C
polyploidy

D
heteroploidy
Question 6
1 / -0

Monohybrid ratio is

A
3:1

B
9:1

C
9:3:3:1

D
9:3:1

Solution

Monohybrid ratio is the ratio of different phenotypic traits obtained on hybridizing single pair of trait. It is 3:1. When tall pea plant is crossed with dwarf, the offspring obtained are in 3/4 tall and 1/4 dwarf.
Question 7
1 / -0

What would a gene be called if it is inherited by both males and females, but expressed differently in the phenotype of a boy and a girl?

A
Unstable

B
Sex-controlled

C
Recessive

D
Structural

E
Dominant
Question 8
1 / -0

The innate tendency of offspring to resemble their parents is called

A
Resemblance

B
Heredity

C
Inheritance

D
Variation

Solution

The innate tendency of offspring to resemble their parents is called heredity. The offspring resembles to parent due to same genetic combination inherited from parents.
Question 9
1 / -0

A Barr body is present in a male child. The syndrome most likely to occur is

A
Klinefelter's syndrome

B
Down's syndrome

C
Turner's syndrome

D
Edward's syndrome

E
Trisomy
Question 10
1 / -0

Chiasmata formation in Drosophila

A
generally takes place in males and females

B
takes place only in males

C
never or rarely takes place in males

D
never or rarely take place in females
Question 11
1 / -0

Phenylketonuria is a genetic disorder of

A
trisomic condition

B
monosomic dominant gene

C
autosomal dominant gene

D
autosomal recessive gene

E
None of these
Question 12
1 / -0

A cross between yellow round and green wrinkled seed pea plants gave the following four types of progeny in equal proportions: yellow round, yellow wrinkled, green round and green wrinkled. The genotypes of the parents in this case must be

A
YYRR X yyrr

B
YyRr X yyrr

C
YYRR X YYRR

D
YyRr X YYRR

E
yyrr X yyrr
Question 13
1 / -0

Drosophila flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that

A
Y-chromosome is essential for sex determination in Drosophila

B
Y-chromosome is female determinator in Drosophila

C
Y-chromosome is male determinator in human beings

D
Y-chromosome has no role in sex determination either in Drosophila or in human beings

E
None of the above
Question 14
1 / -0

The genotypic ratio in a monohybrid cross is

A
3 : 1

B
9 : 3 : 3 : 1

C
2 : 2 : 1

D
1 : 2 : 1

E
2 : 1 : 3
Question 15
1 / -0

Who is regarded as the father of genetics?

A
Mendel

B
Bateson

C
Morgan

D
Watson

Solution

Mendel is regarded as the father of genetics due to his initial law of inheritance given by him on the basis of Hybridisation conducted by him on garden pea.
Question 16
1 / -0

Which of the following chromosome numbers is present in a trisomic individual?

A
2n + 1

B
2n - 1

C
2n - 2

D
2n + 2
Question 17
1 / -0

When chromosome sets are present in multiples of 'n', the condition is called

A
polyploidy

B
aneuploidy

C
euploidy

D
diploidy

E
monoploidy
Question 18
1 / -0

Sex-influenced genes are coded by

A
autosomal genes

B
X linked genes

C
Y linked genes

D
epistatic genes

E
none of the above
Question 19
1 / -0

'Gametes are never hybrid'. It is a statement of the law of

A
dominance

B
segregation

C
independent assortment

D
random fertilisation

E
linkage
Question 20
1 / -0

Genotype is the

A
Genetic combination

B
Trait expressed

C
Genetic constitution of the phenotype

D
Expressed genes

Solution

Genotype is the genetic combination of an individual. TT and Tt are genotypically different but phenotypically appear tall

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Re-Attempt Weekly Quiz Competition

Principles of Inheritance and Variation Test - 17

Result

Principles of Inheritance and Variation Test - 17

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SHARING IS CARING

Question 1

Pisumsativum

Lathyrusodaratus

Mirabilis jalappa

Oryza sativa

Solution

Question 2

tetrasomy

nullisomy

monosomy

trisomy

Question 3

Both Assertion and Reasoning are true and R is the correct explanation of A.

Both Assertion and Reasoning are true and R is not the correct explanation of A.

A is true and R is false.

Both A and R are false.

A is false and R is true.

Question 4

TT x Tt

Tt x Tt

Tt x tt

TT x tt

Question 5

euploidy

aneuploidy

polyploidy

heteroploidy

Question 6

3:1

9:1

9:3:3:1

9:3:1

Solution

Question 7

Unstable

Sex-controlled

Recessive

Structural

Dominant

Question 8

Resemblance

Heredity

Inheritance

Variation

Solution

Question 9

Klinefelter's syndrome

Down's syndrome

Turner's syndrome

Edward's syndrome

Trisomy

Question 10

generally takes place in males and females

takes place only in males

never or rarely takes place in males

never or rarely take place in females

Question 11

trisomic condition

monosomic dominant gene

autosomal dominant gene

autosomal recessive gene

None of these

Question 12

YYRR X yyrr

YyRr X yyrr

YYRR X YYRR

YyRr X YYRR

yyrr X yyrr

Question 13

Y-chromosome is essential for sex determination in Drosophila

Y-chromosome is female determinator in Drosophila

Y-chromosome is male determinator in human beings