Principles of Inheritance and Variation Test

Result

Principles of Inheritance and Variation Test - 98

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Find out the incorrect regarding the mutations.

A
Random, occur in any direction

B
Full-fledged, so there are no intermediate forms

C
Discontinuous, non-cumulated over generations

D
Subjected to natural selection
Question 2
1 / -0

Mendel's laws were first published in the year

A
1875

B
1890

C
1928

D
1866

Solution

Mendelian inheritance is a type of biological inheritance that follows the laws originally proposed by Gregor Mendel in 1865 and 1866 and rediscovered in 1900.
So, the correct option is '1866'.
Question 3
1 / -0

Which of the following statement is not true?

A
Mutation is change in genetic material

B
Total number of chromosome is $$46$$ is Down's syndrome

C
Chromosomal mutation can be easily studied by analysis of karyotype

D
Both (B) and (C)
Question 4
1 / -0

In garden pea plant (Pisum sativum) gene of seed shape shows:
(a) Dominance
(b) Incomplete dominance
(c) Pleiotropy
(d) Multiple allele
(e) Polygenic inheritance.

A
Only a

B
a, b and c

C
b, c and d

D
a, b, c and d
Question 5
1 / -0

Mr. Kapoor is heterozygous for one autosomal gene pair(Bb). He carries a recessive X-linked gene d. What proportion of his sperms will be of $$bX^d$$ type?

A
$$0$$

B
$$1/2$$

C
$$1/4$$

D
None of the above
Question 6
1 / -0

Wife is PTC non-taster and husband is PTC taster. Their son is taster but daughters are non-tasters. This is not a sex linked trait. Which pedigree is correct?

A

B

C

D
Solution
A.Correct option - B
B.Explanation for correct option:
- People having the ability to taste the bitter compound phenylthiocarbamide or PTC, are PTC tasters whereas, for some people, PTC seems tasteless and such people are called PTC non-tasters.
- The inability to taste PTC is an autosomal recessive genetic disorder i.e. it occurs when the allele responsible for this trait is present in homozygous recessive condition on the autosomes.
- The husband and his son is a PTC taster. The wife and daughters are non-PTC tasters.
Thus, the correct answer is option B.
Question 7
1 / -0

In a dihybrid cross, when one pair of alleles show incomplete dominance, genotypic ratio comes to?

A
$$3:6:3:1:2:1$$

B
$$1:2:2:4:1:2:1:2:1$$

C
$$9:3:3:1$$

D
$$1:2:1$$
Question 8
1 / -0

Study the pedigree chart given below
What does it show:

A
Inheritance of phenylketonuria

B
Inheritance of colourblindness

C
Inheritance of myotonic dystrophy

D
Inheritance of hypertrichosis

Solution

A-
The pedigree chart depicts that the parents are normal but offsprings are affected which indicates that it is present in recessive form in the parents. Inheritance of phenylketonuria has recessive autosomal characters hence option A is correct. While in inheritance of colour blindness & inheritance of hypertrichosis, both males & females are not affected & both have sex linked inheritance characters hence options inheritance of colour blindness & inheritance of hypertrichosis is ruled out.
Question 9
1 / -0

If polygenic trail is conyrolled by two gene pairs than what will be the probability of individuals in $$F_2$$ generation showing exacts resemblances to $$F_1$$ progeny.

A
$$\frac{6}{16}$$

B
$$\frac{4}{16}$$

C
$$\frac{2}{16}$$

D
$$\frac{1}{16}$$

Solution
Question 10
1 / -0

Which of the following is not a pleiotropic gene?

A
Starch branching enzyme coding gene

B
Flower colour gene of Pisum sativum

C
Leaf colour gene of snapdragon

D
I gene of Blood group