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XX-XO Type

Write the typ...

Question

Write the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ

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Solution

(i) Female XX with male XO is male heterogamety. For example, grasshopper.
(ii) Female ZW with male ZZ is female heterogamety. For example, birds.

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Q. Write the type of sex determination mechanism for the following. Give an example of each type.

(i) Female XX and male XO (ii) Female ZW and male ZZ.

Q. Five Mark Questions :
(a) Explain the mechanism of sex determination in humans.
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Q. Assertion :XX-XY type of sex determination mechanism is an example of female heterogamety and is found in Drosophila. Reason: Male heterogamety is seen in moths where males produce two different types of gamete.

Q. Which of the following is an example of ZW-ZZ type of mechanism of sex determination?

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