Principle of inheritance and variation practice · Medium

Mutations are generally induced by means of

Number of chromosomes present in the meiocyte of house fly is

Ratio of progeny, when a red coloured heterozygote is crossed with a white coloured plant in which red colour is dominant to white colour

Females are heterogametic in all except

The chromosome constitution 2n-2 of an organism represents

A cross between two plants of Pisum sativum having violet coloured flowers, resulted in production of few plants producing white flowers. What would be the genotype of the parent plants?

Which of these is a dominant factor?

Number of chromosomes are different in male and female individuals in

In sex linkage, the speciality is

Assertion : Haemophilia never occurs in women.

Reason : Gene for haemophilia is located on X
chromosome.

A child of blood group-O cannot have parents of blood groups

$\left( N \right) \times \left( {N + 1} \right)$ gametic combination will cause which of the following types of mutation?

A child has heterozygous allele for blood group A. What can be most possible interpretation w.r.t. blood group of his/her parents?
A) Both the parents have same genotype ${\mathrm{I}^\mathrm{A}}\,\,{\mathrm{I}^\mathrm{O}}$ and ${\mathrm{I}^\mathrm{A}}\,\,{\mathrm{I}^\mathrm{O}}$
B) Both the parents are of blood group O
C) One of the parent may have blood group AB while other have blood O.

The genotypes of a plant variety were TtHh, Tthh, ttHh and tthh, where T = tallness and H = hairy stem. Which one of the following crosses would produce progeny giving a phenotypic ratio approximately $1: 1: 1: 1$?

Which of the following pairs of features is a good example of polygenic inheritance?

In a plant, red fruit (R) 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. Then

After examining the blood groups of husband and wife, the doctor advised them not to have more than one child, the blood group of the couple are likely to be

In blood group typing in human, if an allele contributed by one parent is ${\mathrm{I}^\mathrm{A}}$and an allele contributed by the other parent is i, the resulting blood group of the offspring will be

The nucleoprotein structures that occur at the ends of the chromosomes are

Chromosome is made up of

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

Multiple allele can be manifested only when there is the study of

Genes for cytoplasmic male sterility in plants are generally located in

Select the correct statement from the ones given below with respect to dihybrid cross.

Two crosses between the same pair of genotypes or phenotypes, in which the sources of the gametes are reversed in one cross, is known as

Ishihara chart is used to detect

What will be the linkage strength present between two genes A & B, which are 6 cM far from each other on a chromosome?

Assertion : Sickle-cell anaemia is a genetically
determined disorder affecting many new born
babies.

Reason : It is caused by heterozygosity for
allele $H{b^s}$
producing a single amino acid
substitution in the a-chain of the normal
haemoglobin molecule determined by allele $H{b^A}$
.

In which cross will you get most pink flowers?

Cytoplasmic inheritance always shows