MCQs of Biology – Sex Determination

The males of grasshoppers and bugs posses two sets of autosomes and:

The sex determination pattern in honeybee is called:

Which of the following is not true?

Larva of Bnellia settling near the proboscis of adult female develops into male due to:

Heterogametic male condition does not occur in:

Which of the following symbols are used for representing sex chromosomes of birds ?

Genic balance theory of sex determination was proposed by:

Balance theory of sex determination holds good for:

Drosophila melanogaster has:

Sex determination in Drosophila melanogaster is based on:

In Drosophila, the sex is determined by:

Super male and super female type of determination of sex in Drosophila is based on:

2A+ XO Drosophila are:

Which of the chromosomal formulation is responsible for the expression of meta- male character in Drosophila?

According to genic balance theory, X/A= 1.5 Drosophila individual will be:

When an animal has both the characters of male and female, it is called:

A fruityfly exhibiting both male and female traits is:

The term ‘gynandromorph’ was introduced by:

Gynandromorphs are:

Gynandromorphism in certain flies is the result of:

Gynandromphs are animals having:

In most animals, sex of the offspring is established during:

Sex determining chromosomes are called:

Sex chromosomes are also called:

Sex chromosomes of male are:

XY sex chromosomes were discovered by:

In which of the following the sex chromosomes were discovered for the first time in plants?

In Melandrium, the sex determination type is:

Sex chromosomes are found in the cells of:

Which one is found in males only?

The male child is born when sperm with:

Sex of a human child is determined by:

A girl receives her X- chromosomes from:

A boy receives his X- chromosome from:

In human sex determination the key factor is:

Human Y- chromosome is:

In human being, the chromosomal condition of male is:

In recent years, DNA sequences (nucleotide sequence ) of mt- DNA and Y-chromosomes were considered for the study of human evolution, because:

A family has five girls and no sons.Probability of son in the sixth child will be:

Probability, of four sons to a couple is:

Unfertilized egg of human contains:

In human zygote , male sex is determined by:

Average ratio of men and women in human population is:

In man, sex determination depends upon chromosomes present in:

When released from ovary, human egg contains:

XX- chromosomal condition is:

The chromosome that determines the male sex in human is called: