Principles of Inheritance and Variation PYQ — Page 7

A person showing unpredictable moods. outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from:

Cri-du-chat syndrome in humans is caused by the:

Phenotype of an organism is the result of:

Which one of the following is the most suitable medium for culture of Drosophila melanogaster?

De Vries gave his mutation theory on organic evolution while working on:

Which of the following is not a hereditary disease?

A women with 47 chromosomes due to three copies of chromosome 21 is characterized by:

Haemophilia is more commonly seen in human males than in human females because:

In order to find out the different types of gametes produced by a pea plant having the genotype $\mathrm{AaBb}$ it should be crossed to a plant with the genotype:

A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters affected. Which of the following mode of inheritance do you suggest for this disease?

A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy:

Genes for cytoplasmic male sterility in plants are generally located in:

Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to:

One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as male. During segregation of $\mathrm{F}_2$ progenies that mutation is found in:

Crossing over that results in genetic recombination in higher organisms occurs between:

A male human is heterozygous for autosomal genes $\mathrm{A}$ and $\mathrm{B}$ and is also hemizygous for hemophilic gene $h$. What proportion of his sperms will be $a b h$ ?

In a plant, red fruit $(R)$ is dominant over yellow fruit $(r)$ and tallness $(T)$ is dominant over shortness $(t)$. If a plant with RRTt genotype is crossed with a plant that is rrtt,

A normal woman, whose father was colour-blind is married to a normal man. The sons would be:

A self-fertilizing trihybrid plant forms:

A nutritionally wild type organism, which does not required any additional growth supplement is known as:

The recessive genes located in $X$ chromosome humans are always:

In mutational event, when adenine is replaced by guanine. it is a case of:

In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be:

Extranuclear inheritance is the consequence of presence of genes in: