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  4. Which of the following is correct about ZW-ZZ type of sex determination in birds?

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Q. Which of the following is correct about $ZW-ZZ$ type of sex determination in birds?

NTA AbhyasNTA Abhyas 2020Principles of Inheritance and Variation

Solution:

In $ZW-ZZ$ mechanism, female carries one $\text{Z and one W}$ chromosome, thus females form two types of gametes, $\text{50\% with Z and 50\% }$ with $W$ chromosomes.