MEDIUM

Earn 100

Assertion (A): In honey bees, males have no father and they cannot have sons, but they do have grand fathers and grand sons.

Reason (R) : They develop directly by parthenogenesis from unfertilised ova.

The correct option among the following is

50% studentsanswered this correctly

Important Questions on Inheritance and Variation

EASY

Biology>Genetics and Evolution>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 _________

MEDIUM

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

Select the incorrect statement?

HARD

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

Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?

MEDIUM

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

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

EASY

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

Give one reason to justify the statutory ban of amniocentesis.

EASY

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

Sterile female bees are

MEDIUM

Biology>Genetics and Evolution>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?

EASY

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

Amniocentesis is a diagnostic procedure to detect

HARD

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

Explain the sex determination process in humans with the help of ray diagram.

EASY

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

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

MEDIUM

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

Fill in the blank with the correct option from the bracket.