Principles of Inheritance and Variation PYQ — Page 3

Select the incorrect statement.

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

Which of the following muscular disorders is inherited?

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 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?

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

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

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

Select the correct statement.

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

Which of the following pairs is wrongly matched?

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?

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.

A disease caused by an autosomal primary non-disjunction is

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

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

Which of the following most appropriately describes haemophilia?

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>

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

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

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.

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

A true breeding plant is: