Biology Test 185

Result

Biology Test 185

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Weekly Quiz Competition

Question 1
4 / -1

The number of linkage groups in Pisum sativum is :-

A
Five

B
Seven

C
Nine

D
Ten
Question 2
4 / -1

XO type of sex determination is found in :-

A
Grasshopper

B
Birds

C
Reptiles

D
Fishes
Question 3
4 / -1

Which of the following is true for honey bee?

A
Male diploid, female haploid

B
Male haploid, female haploid

C
Female diploid, male haploid

D
Female diploid, male diploid
Question 4
4 / -1

Female heterogamety can be seen in :-

A
Human

B
Grasshopper

C
Bird

D
Honeybee
Question 5
4 / -1

Which of the following was discovered by Henking ?

A
Y-body

B
X-body

C
Linkage

D
Genic-balance method
Question 6
4 / -1

In Morgan’s experiment, what was the percentage of recombinants in case of Drosophila’s body colour and eye colour ?

A
37.2%

B
98.7%

C
1.3%

D
62.8%
Question 7
4 / -1

Which of the following equation is correct regarding the Hardy-Weinberg’s law ?

A
p² + 2pq + q² = 1

B
p² + pq + q² = 1

C
p² + 2pq + q² = 0

D
p² + pq + q² = 0
Question 8
4 / -1

Which symbol of pedigree is correctly matched?

A

B

C
→ Affected male of autosomal recessive disease

D
→ Marriage between close relatives
Question 9
4 / -1

In a random mating population of 40,000 individuals, percentage of homozygous dominant individuals is 49% then find out the percentage of homozygous individuals?

A
42%

B
9%

C
58%

D
49%

Solution

Homozygous individuals = p² + q²
p² = 0.49
p = 0.7 p² + q² = (0.7)² + (0.3)²
q = 1 – P = 1–0.7 = 0.49 + 0.09
= 0.3 = 0.58 or 58%
Question 10
4 / -1

The existence of harmful allele in a population in heterozygous genotype is :

A
Genetic load

B
Genetic drift

C
Genetic flow

D
Selection