Home
Class 12
BIOLOGY
Assertion (A) According to "genic balal...

Assertion (A) According to "genic balalnce therory" the karyotype with AA-XO in Drosophila is sterile female .
Reason (R ) Y- chromosome in Drosophila lacks male determining factor

A

Both A and R are true . R ois correct explanation of A

B

Both A and R are true ,R is not correct explanation of A

C

A is true but R is false

D

A is false but R is true

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • CHROMOSOMAL BASIS OF INHERITANCE

    DINESH PUBLICATION|Exercise Check Your Grasp|45 Videos

  • CHORDATA- PROTOCHORDATA

    DINESH PUBLICATION|Exercise CYG|7 Videos

  • COELENTERATA AND CTENOPHORA (OR CNIDARIA AND ACNIDARIA)

    DINESH PUBLICATION|Exercise CYG|9 Videos

Similar Questions

Explore conceptually related problems

Assertion: According to Bridges, the Y-chromosome is responsible only for the fertility of sex and not for sex determination in Drosophila. Reason: According to Bridges in Drosophila, autosomes are responsible for feminine characteristics.

Assertion(A): Gamete disseminated by the male determines whether the child produced will be male or female in Homo sapiens. Reason (R): Some genes on X-chromosome and Y-chromosomes determine the gender of the progeny. Its a polygenic trait.

Assertion : In humans, the gamete contributed by the male determines wheter the child produced will be male or female Reason : Sex in humasn is a polygenic trait depending upon a cumulative efffect of some genes on X-chromosome and some on Y-chromosome .

Assertion (A): The sex of a child in human beings will be determined by the type of chromosome he/she inherits from the father. Reason (R): A child who inherits 'X' chromosome from his father would be a girl (XX), while a child who inherits a 'Y' chromosome from the father would be a boy (XY).

Assertion In human, female sex is determined by XX chromosome Reason Male sex is determined by XY-chromosome

Assertion (A): In humans, males play an important role in determining the sex of the child. Reason (R): Males have two X chromosomes.