Males are the homogametic sex ( ZZ ), while females are the heterogametic sex ( ZW ).
2.
Haldane's rule states that if in a species sterile, that sex is usually the heterogametic sex.
3.
Because the male Savannah is the heterogametic sex, they are most commonly affected, in accordance with Haldane's rule.
4.
Many butterflies are ZW sex-determination system where females are the heterogametic sex ( ZW ) and males homogametic ( ZZ ).
5.
The heterogametic sex is the one with two different sex chromosomes; in mammals, this is the male, with XY chromosomes.
6.
Among the insects, Lepidopterans ( butterflies and moths ) have heterogametic females, but in " Drosophila ", males are the heterogametic sex.
7.
This could cause the heterogametic sex chromosome in the hybrid to be inviable or sterile, but homogametic sex chromosome will be fertile ( Futuyma 1997 ).
8.
Alternatively, birds might show decreased transcription of the two Z chromosomes present in the male heterogametic sex, similar to the system observed in the two male X chromosomes of Drosophila.
9.
This system is in contrast with the ZW sex-determination system found in birds, some insects, many reptiles, and other animals, in which the heterogametic sex is female.
10.
The heterogametic sex ( males in humans ) only receives one of each sex chromosome and will therefore show recessive trait even if they have only inherited one copy of a recessive allele.
मोबाइल