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7 Terms
Which statement best describes the defining features of human sex determination?
Individuals with a Y chromosome missing the SRY gene are females.
Which kind of sex does a fruit fly have if its genotype is 3A and XX?
Intersex
Which of the following best describes the Lyon hypothesis?
One of the two female X chromosomes is randomly inactivated in an early embryonic stage.
In chickens, the hens are the heterogametic sex. Which sex has a Y chromosome?
Neither male nor female
How many X chromosomes are inactivated in an individual with an XXXY genotype?
2
How many active X chromosomes should be in a cell with the XO genotype?
1
How many Barr bodies do you expect to see in a cell with the XXXXXY genotype?
4