Biology Test 186

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Biology Test 186

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Weekly Quiz Competition

Question 1
4 / -1

In Pedigree analysis symbol is used for :

A
Heterozygous for autosomal recessive trait

B
Affected individuals

C
Death

D
Carrier for sex-linked recessive trait
Question 2
4 / -1

In this given pedigree what is the mode of inheritance

A
Autosomal dominant

B
Autosomal recessive

C
X-linked dominant

D
X-linked recessive
Question 3
4 / -1

In a random mating population frequency of recessive allele is 0.7. What will be the frequency of dominant phenotype ?

A
0.09

B
0.91

C
0.51

D
0.21

Solution

q = 0.7 so, p = 1 – q = 1 – 0.7
= 0.3
dominant phenotype = p² + 2pq
= (0.3)² + 2 × (0.3) × (0.7)
= 0.09 + 0.42 = 0.51
Question 4
4 / -1

Which of the following processes affect the Hardy-Weinberg equilibrium to cause variation at the genetic level :-

A
Mutation & recombination

B
Gene migration & genetic drift

C
Natural selection

D
All the above
Question 5
4 / -1

The frequency of a gene or allele remain constant according to hardy weinberg law, when :-

A
Selection occurs in population.

B
Mutation rate is high & produces many new alleles.

C
One sided large scale migration occurs.

D
Population is large & randomly mating.
Question 6
4 / -1

According to Hardy Weinbergh law the frequency of organism having homozygous character will be :-

A
p²

B
q²

C
p² + 2pq

D
p² + q²
Question 7
4 / -1

Generally mutations are :-

A
Recessive

B
Incompletely dominant

C
Dominant

D
Co-dominant
Question 8
4 / -1

A person with 47 chromosomes due to XXY condition suffers from disorder called :-

A
Turner syndrome

B
Down syndrome

C
Klinfelter syndrome

D
Edward syndrome
Question 9
4 / -1

Chromosomal dis-orders occurs due to :-

A
Absence or excess or abnormal arrangement of one or more chromosome

B
Linkage

C
Polygenic inheritance

D
Cytoplasmic inheritance

Question 10

4 / -1

Find out correct match from column-I and II

Column-I		Column-II
a	Monosomy	i	2n–1
b	Double monosomy	ii	2n+1
c	Nullisomy	iii	2n–1–1
d	Trisomy	iv	2n–2

a-iii ; b-ii ; c-i ; d-iv

a-i ; b-iii ; c-iv ; d-ii

a-iv ; b-ii ; c-iii ; d-i

a-iii ; b-iv ; c-ii ; d-i

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Biology Test 186

Result

Biology Test 186

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Rank

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SHARING IS CARING

Question 1

Heterozygous for autosomal recessive trait

Affected individuals

Death

Carrier for sex-linked recessive trait

Question 2

Autosomal dominant

Autosomal recessive

X-linked dominant

X-linked recessive

Question 3

0.09

0.91

0.51

0.21

Solution

Question 4

Mutation & recombination

Gene migration & genetic drift

Natural selection

All the above

Question 5

Selection occurs in population.

Mutation rate is high & produces many new alleles.

One sided large scale migration occurs.

Population is large & randomly mating.

Question 6

p2

q2

p2 + 2pq

p2 + q2

Question 7

Recessive

Incompletely dominant

Dominant

Co-dominant

Question 8

Turner syndrome

Down syndrome

Klinfelter syndrome

Edward syndrome

Question 9

Absence or excess or abnormal arrangement of one or more chromosome

Linkage

Polygenic inheritance

Cytoplasmic inheritance

Question 10

a-iii ; b-ii ; c-i ; d-iv

a-i ; b-iii ; c-iv ; d-ii

a-iv ; b-ii ; c-iii ; d-i

a-iii ; b-iv ; c-ii ; d-i

User

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p²

q²

p² + 2pq

p² + q²