How many chromosomes are present in an unfertilized egg

Important Questions on Principles of Inheritance and Variation

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Which of the following organisms produce sperm without involving meiosis?

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Assertion (A): Amniocentesis is used to detect the chromosomal defects if any, in the developing foetus.
Reason (R): Amniocentesis is a cytological study of the foetal cells for abnormal chromosomes.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Select the incorrect statement?

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

In honeybees, sex determination and development occurs through

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

In a certain taxon of insects (Example: Cockroach), some have $17$ chromosomes and the others have $18$ chromosomes. The $17$ and $18$ chromosomes bearing organisms are _________

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

The chromosomal type of sex determination In human beings is

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Assertion (A): In human beings, the sex of the offspring depends on the type of sperm that fertilizes the ovum
Reason (R): Human males are heterogametic
The correct option among the following is

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

How many pairs of autosomal chromosomes are present in human?

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

In the context of Amniocentesis, which of the following statement is incorrect?

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Study the following regarding genic balance theory of sex determination in Drosophila
I. Organism with $\mathrm{AAA} \mathrm{XXX}$ is fertile triploid female
II. Organism with $\mathrm{AAA} \mathrm{XXY}$ is fertile triploid male
III. Organism with $\mathrm{AAA} \mathrm{XX}$ is an intersex
IV. Organism with $\mathrm{AA} \mathrm{XXY}$ is metafemale
Which of the above are correct?

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

The prenatal technique to determine the genetic disorders in a foetus is called

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

From the chromosomal complements given below, identify the one which shows female heterogamety.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

The permissible use of the technique amniocentesis is for

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Sterile female bees are

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

The development of male takes place in honeybee from

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

$\mathrm{XO}$ type of sex determination and $\mathrm{XY}$ type of sex determination are the examples of

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Number of sex chromosomes in human beings are

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Amniocentesis is a diagnostic procedure to detect

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Haplo-diploid insects have diploid females from fertilized eggs but haploid males from unfertilized ones. Such a haploid male with red eyes is crossed with a white-eyed female. Assuming that the red-eye colour mutation is dominant over the white-eye colour, which one of the following statements is true?

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Sex Determination

Select the incorrect statement.