Principles of Inheritance and Variation PYQ — Page 3

The production of gametes by the parents, the formation of zygotes, the $\mathrm{F}_1$ and $\mathrm{F}_2$ plants, can be understood using

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

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 frequency of recombination between gene pairs on the same chromosome as a measure of the distance gene was explained by:

What map unit (Centimorgan) is adopted in the construction of genetic maps?

Select the incorrect statement.

A woman has X-linked condition on one of her X chromosomes. These chromosomes can be inherited by:

Which of the following pairs is wrongly matched?

Which of the following characteristics represent 'Inheritance of blood groups' in humans? i. Dominance ii. Co-dominance iii. Multiple alleles iv. Incomplete dominance v. Polygenic inheritance

Select the correct statement.

A disease caused by an autosomal primary non-disjunction is

Among the following characters, which one was not considered by Mendel in his experiments on pea?

Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

Which one from those given below is the period for Mendel's hybridization experiments?

The genotypes of a Husband and Wife are ${I}^{A} {I}^{B}$ and ${I}^{A}i$ . Among the blood types of their children, how many different genotypes and phenotypes are possible?

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the ${F}_{1}$ plants were selfed the resulting genotypes were in the ratio

If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

A true breeding plant is:

Match the terms in Column-I with their description in Column-II and choose the correct option: <table class="pyq-table"><tbody><tr><td>Column - I</td><td>Column - II</td></tr><tr><td>(a) Dominance</td><td>(i) Many genes govern a single character</td></tr><tr><td>(b) Codominance</td><td>(ii) In a heterozygous organism, only one allele expresses itself</td></tr><tr><td>(c) Pleiotropy</td><td>(iii) In a heterozygous organism, both alleles express themselves fully</td></tr><tr><td>(d) Polygenic inheritance</td><td>(iv) A single gene influences many characters</td></tr></tbody></table>

The mechanism that causes a gene to move from one linkage group to another is called:

In a testcross involving F$_{1}$ dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates:

Which of the following most appropriately describes haemophilia?

Pick out the correct statements: (i) Haemophilia is a sex-linked recessive disease. (ii) Down's syndrome is due to aneuploidy. (iii) Phenylketonuria is an autosomal recessive gene disorder. (iv) Sickle cell anaemia is an X-linked recessive gene disorder.