Daily Practice Problems Principles of Inheritance and Variation

Question 1:

Which among the following scientists was not involved in the rediscovery of Mendel’s work? [Level: Moderate]

(a) Carl Correns

(b) T.H. Morgan

(d) E. Von Tschermak

Question 2:

If a woman with blood group AB marries a man with heterozygous for blood group B, what would be the probable percentage of their progeny having blood group B? [Level: Moderate]

(a) 25%

(b) 50%

(d) 100%

Question 3:

The cross performed to identify the genotype of the dominant trait is: [Level: Moderate]

(a) monohybrid cross

(b) dihybrid cross

(d) back cross

Question 4:

The character which was not chosen by Mendel in his hybridisation experiments on pea plant was: [Level: Easy]

(a) seed colour

(b) flower position

(d) pod colour

Question 5:

The F2-phenotypic ratio of a typical dihybrid cross is: [Level: Easy]

(a) 1:1

(b) 3:1

(d) 9:3:3:1

Question 6:

In a linear chromosome map, recombination frequencies between four pairs of genes are as follows – a-b 10%, a-d 3%, b-c 4%, a-c 6%, a-d 3%, d-c 3% and b-d 7%. Using this information determine the sequence of genes on the chromosome. [Level: Difficult]

(a) a – d – c – b

(b) a – b – c – d

(d) a – d – b – c

Question 7:

Which of the following is not observed in the inheritance of blood groups in humans? [Level: Moderate]

(a) Codominance

(b) Multiple allelism

(d) Dominance

Question 8:

Genetic constitution of an individual suffering from Turner’s syndrome is: [Level: Moderate]

(a) 45 +XX

(b) 44 + XXY

(d) 45 + XO

Question 9:

ZZ-ZW type of sex determination is seen in: [Level: Easy]

(a) Drosophila

(b) humans

(d) birds

Question 10:

Given below is a pedigree analysis of a genetic disorder. Study the same and find out the nature of the trait based on the inheritance pattern. [Level: Difficult]

(a) Autosomal recessive

(b) X-linked recessive

(d) X-linked dominant

Question 11:

Which among the following proposed that the distance between a gene pair located chromosome can be determined by their recombination frequency? [Level: Moderate]

(a) Sturtevant

(b) Morgan

(d) Boveri

Question 12:

Which among the following best describe pleiotropy? [Level: Moderate]

(a) One gene – many traits

(b) Many genes – one trait

(d) Many genes – one allele

Question 13:

A cross between F1-hybrid (carrying two heterozygous pairs of alleles for tall and blue) and homozygous recessive alleles for these two genes (dwarf and white). The probable progeny will have: [Level: Difficult]

(a) all tall and blue

(b) 1 (tall and blue) : 2 (tall and white) : 1 (dwarf and white)

(d) 1 (tall and blue) : 1 (tall and white) : 1 (dwarf and blue) : 1 (dwarf and white)

Question 14:

Which of the following disorder is characterised by gynaecomastia? [Level: Moderate]

(a) Turner’s syndrome

(b) Klinefelter’s syndrome

(d) Edward’s syndrome

Question 15:

Which among the following organisms do not show male heterogamety? [Level: Moderate]
(a) Drosophila

(b) Birds

(d) Grasshopper

Question 16:

Statement I: [Level: Difficult]
Sickle cell anaemia is a sex-linked recessive trait.

Statement II:

Sickle cell anaemia is a quantitative disorder related to the blood.

With respect to the statements given above, choose the correct answer from the options given below:

(a) Statement I is correct but Statement II is incorrect.

(b) Statement I is incorrect but Statement II is correct.

(d) Both Statement I and Statement II are correct.

Question 17:

Match the items given in Column I to Column II and find the correct answer from the options given below: [Level: Difficult]

Column I	Column II
1. Turner’s syndrome	(i) Quantitative defect
2. Down’s syndrome	(ii) Trisomy of 21st chromosome
3. Sickle cell anaemia	(iii) 44 + XO
4. Thalassemia	(iv) Qualitative defect

	1.	2.	3.	4.
(a)	(iii)	(ii)	(iv)	(i)
(b)	(ii)	(iii)	(iv)	(i)
(c)	(iii)	(ii)	(i)	(iv)
(d)	(ii)	(iii)	(iv)	(i)

Question 18:

If both the parents are carriers for sickle cell anaemia, which is an autosomal recessive disorder, what percent of progeny would be affected with the disease? [Level: Moderate]

(a) 25%

(b) 50%

(d) None

Question 19:

Which of the following is not an autosomal disorder? [Level: Easy]

(a) Haemophilia

(b) Sickle cell anaemia

(d) Thalassemia

Question 20:

The experimental verification of the Chromosomal Theory of Inheritance was given by: [Level: Easy]

(a) Theodor Boveri and Walter Sutton

(b) Temin and Baltimore

(d) William Bateson

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All About Daily Practice Problems on NEET Biology Principles of Inheritance and Variation NCERT Chapter 5

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