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  • Which of the following is correct w.r.t ZW-ZZ types of sex determination? 1) The females are heterogametic and carry ZW sex chromosomes. 2) The males are heterogametic and

Which of the following is correct w.r.t ZW-ZZ types of sex determination?

1) The females are heterogametic and carry ZW sex chromosomes.

2) The males are heterogametic and carry ZW sex chromosomes.

3) The males are homogametic and carry ZZ sex chromosomes.

4) The females are homogametic and carry ZZ sex chromosomes.

 

Option: 1

1 & 2


Option: 2

2 & 3


Option: 3

1 & 3

 


Option: 4

2 & 4


Answers (1)

best_answer
 

As we have studied in:

Sex Determination: ZW Female & ZZ Males Type -

  • In butterflies and birds, the female is heterogametic having dissimilar Z and W chromosomes.
  • The male is homogametic having similar ZZ chromosomes (It is a convention to designate female as ZW instead of XY and male as ZZ instead of XX).

Therefore, in ZW-ZZ type of sex determination, females are heterogametic (ZW) and males are homogametic (ZZ) for sex chromosomes. 

Hence, the correct answer is option c.

Posted by

manish

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