Principles of Inheritance and Variation PYQ — Page 2

If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?

Given below are two statements : Statement I : Sickle cell anaemia and Haemophilia are autosomal dominant traits . Statement II : Sickle cell anaemia and Haemophilia are disorders of the blood. In the light of the above statements, choose the correct answer from the options given below :

If a female individual is with small round head, furrowed tongue, partially open mouth and broad palm with characteristic palm crease. Also the physical, psychomotor and mental development is retarded. The karyotype analysis of such an individual will show :

$\mathrm{XO}$ type of sex determination can be found in:

Given below are two statements one is labelled as: Assertion (A) and the other is labelled as Reason (R). Assertion (A): Mendel's law of independent assortments does not hold good for the genes that are located closely on the same chromosome. Reason (R); Closely located genes assort independently. In the light of the above statements, choose the correct answer from the options given below:

Which of the following occurs due to the presence of autosome linked dominant trait?

A normal girl, whose mother is haemophilic marries a male with no ancestral history of haemophilia. What will be the possible phenotypes of the offsprings ? (a) Haemophilic son and haemophilic daughter. (b) Haemophilic son and carrier daughter. (c) Normal daughter and normal son. (d) Normal son and haemophilic daughter. Choose the most appropriate answer from the options given below :

The chromosomal theory of inheritance was proposed by :

What is the expected percentage of $\mathrm{F}_2$ progeny with yellow and inflated pod in dihybrid cross experiment involving pea plants with green coloured, inflated pod and yellow coloured constricted pod?

Select the incorrect match regarding the symbols used in Pedigree analysis:

The recombination frequency between the genes a and c is $5%$, b and c is $15%$, b and d is $9%$, a and b is $20%$, c and d is $24%$ and a and d is $29%$. What will be the sequence of these genes on a linear chromosome?

Given below are two statements: Statement I: Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance. Statement II: Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height. In light of the above statements, choose the correct answer from the options given below:

The production of gametes by the parents, formation of zygotes, the ${F}_{1}$ and ${F}_{2}$ plants, can be understood from a diagram called:

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.

The number of contrasting characters studied by Mendel for his experiments was:

Select the correct match.

The best example for pleiotropy is:

Chromosomal theory of inheritance was proposed by:

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

Experimental verification of the chromosomal theory of inheritance was done by

The genetic disorder in which an individual has an overall masculine development, gynaecomastia and is sterile:

Which of the following muscular disorders is inherited?

In a marriage between male with blood group A and female with blood group B, the progeny had either blood group $\mathrm{AB}$ or $\mathrm{B}$. What could be the possible genotype of parents?