Principles of Inheritance and Variation PYQ — Page 2

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 :

The chromosomal theory of inheritance was proposed by :

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 :

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:

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

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?

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 :

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:

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

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

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?

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

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.

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

The best example for pleiotropy is:

Chromosomal theory of inheritance was proposed by:

Experimental verification of the chromosomal theory of inheritance was done by

Match the items of Column I with Column II.  Select the correct option from the following

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F$_{1}$ generation, pink flowers were obtained. When pink flowers were selfed, the F$_{2}$ generation showed white, red and pink flowers. Choose the incorrect statement from the following.

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