Principles of Inheritance and Variation PYQ — Page 7

Phenotype of an organism is the result of:

How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

Sickle cell anaemia has not been eliminated from the African population because:

Both Sickle cell anaemia and Huntington's chorea are:

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

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

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:

Which of the following is not a hereditary disease?

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

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?

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

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:

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

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

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:

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 $a b h$ ?

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

A self-fertilizing trihybrid plant forms:

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

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

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,

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

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

Extranuclear inheritance is the consequence of presence of genes in: