Biology MCQ

A colourblind man marries a woman, who is homozygous for normal colour vision, the probability of their son being colour blind is ……………….

Find the mismatched pair:

If the genes are located in a chromosome as p-q-r-s-t, which of the following gene pairs will have least probability of being inherited together ?

Chromosomal theory of inheritance was proposed by ……………….

If the centromere is situated near the end of the chromosome, the chromosome is called ……………….

When phenotypic and genotypic ratios are the same, then it is an example of ……………….

A cross between an individual with an unknown genotype for a trait with recessive plant for that trait is ……………….

In a dihybrid cross, F2 generation offspring show four different phenotypes while the genotypes are ……………….

Phenotypic ratio of incomplete dominance in Mirabilis jalapa.

Down’s syndrome is represented by ……………….

Myopia is an example of ……………….

In which of the following disorders the number of chromosomes present is (extra) 47?

If centromere is situated in the middle of the chromosome, it is called ……………….

If only one ‘X’ chromosome is found in a female person, which of the following symptoms will she show?

The pairing of homologous chromosomes is called ……………….

A mature woman has ………………. linkage groups.

Crossing over occurs at the time of ……………….

Out of the following combinations which individual will have maximum genetically active DNA?

Find the mismatched pair :

On what basis are the chromosomes usually classified?

Small swellings on the surface of the chromosome are called ……………….

The synonymous term for centromere is ……………….

Presence of whole sets of chromosomes is called ……………….

The word chroma means ……………….

Which of the following is sex chromosomal disorder ?

The person with Turner’s syndrome has ……………….

Which of the following is also called bleeder’s disease ?

Which of the following is not X-linked disorder ?

The sister chromatids are held together by ……………….

……………… chromosome appears ‘V’-shaped during anaphase.

Appearance of new combinations in F2 generation in a dihybrid cross proves the law of ……………….

A cross used to verify the unknown genotype of F1 hybrid is a ………………. cross.

For the formation of 50 seeds, how many minimum meiotic divisions are necessary?

Which one of the following is an example of multiple alleles?

For demonstrating the law of independent assortment, one should carry out ……………….

Which one of the following is a true pleiotropic gene?

The recombination of characters in a dihybrid cross is related to ……………….

Inheritance of AB blood group is due to ……………….

If a heterozygous tall plant is crossed with a homozygous dwarf plant, the proportion of dwarf progeny will be ……………….

Individuals having identical alleles of a gene are known as ……………….

Genotype refers to the genetic composition of ……………….

Genes located on the same locus but show more than two different phenotypes are called ……………….

When two genes control a single character and have cumulative effect, the ratio is ……………….

When a single gene produces two effects and one of it is lethal, then the ratio is ……………….

A pea plant with yellow and round seeds is crossed with another pea plant with green and wrinkled seeds produce 51 yellow round seeds and 49 yellow wrinkled seeds, the genotype of plant with yellow round seeds must be ……………….

When phenotypic and genotypic ratio is the same, then it is an example of ……………….

Which of the following trait is dominant in Pisum sativum?

Which one of the following characters is recessive in the case of the pea plants?

Down’s syndrome is represented by ……………….

Myopia is an example of ……………….

In which of the following disorders the number of chromosomes present is (extra) 47?

If centromere is situated in the middle of the chromosome, it is called ……………….

If only one ‘X’ chromosome is found in a female person, which of the following symptoms will she show?

The pairing of homologous chromosomes is called ……………….

A mature woman has ………………. linkage groups.

Crossing over occurs at the time of ……………….

Out of the following combinations which individual will have maximum genetically active DNA?

Find the mismatched pair :

On what basis are the chromosomes usually classified?

Small swellings on the surface of the chromosome are called ……………….

The synonymous term for centromere is ……………….

Presence of whole sets of chromosomes is called ……………….

The word chroma means ……………….

Which of the following is sex chromosomal disorder ?

The person with Turner’s syndrome has ……………….

Which of the following is also called bleeder’s disease ?

Which of the following is not X-linked disorder ?

The sister chromatids are held together by ……………….

……………… chromosome appears ‘V’-shaped during anaphase.

Appearance of new combinations in F2 generation in a dihybrid cross proves the law of ……………….

A cross used to verify the unknown genotype of F1 hybrid is a ………………. cross.

For the formation of 50 seeds, how many minimum meiotic divisions are necessary?

Which one of the following is an example of multiple alleles?

For demonstrating the law of independent assortment, one should carry out ……………….

Which one of the following is a true pleiotropic gene?

The recombination of characters in a dihybrid cross is related to ……………….

Inheritance of AB blood group is due to ……………….

If a heterozygous tall plant is crossed with a homozygous dwarf plant, the proportion of dwarf progeny will be ……………….

Individuals having identical alleles of a gene are known as ……………….

Genotype refers to the genetic composition of ……………….

Genes located on the same locus but show more than two different phenotypes are called ……………….

When two genes control a single character and have cumulative effect, the ratio is ……………….

When a single gene produces two effects and one of it is lethal, then the ratio is ……………….

A pea plant with yellow and round seeds is crossed with another pea plant with green and wrinkled seeds produce 51 yellow round seeds and 49 yellow wrinkled seeds, the genotype of plant with yellow round seeds must be ……………….

When phenotypic and genotypic ratio is the same, then it is an example of ……………….

Which of the following trait is dominant in Pisum sativum?

Which one of the following characters is recessive in the case of the pea plants?