In humans, genetic males are XY and genetic females are XX. The abnormal combinations of XXY and XYY are also genetically male, while the combinations of X and XXX are genetically female. Based on this information, which of the following statements about human sex determination must be true?
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In humans, males are XY and females are XX. The abnormal combinations of XXY and XYY are also male, while the combinations of X and XXX are female. Based on this information, which of the following statements about human sex determination must be true? _____________________ When more than one X is present, the organism will always be female. When only one X is present, the organism will always be male. If even one Y is present, the organism will always be male.
Adi S.
Male Sex Determination Part of the HUMAN sex determination pathway is shown above. For A-D, circle the statements that are true and correct the statements that are false. Arrows between genes indicates activation, --| indicate repression. A. Men do not have dosage compensation. B. In X0 and XXX women, the X:A ratio are 1:1 and 3:1, respectively. C. XX human males can arise from non-disjunction during meiosis. D. XYY humans show no dosage compensation. E. Four brothers in a family were found to be 46, XX, sry-; there was no trace of the Y chromosome (including sry) anywhere in their genomes. There are also no mutations in the promoter, repressor/enhancer elements, or coding region of the Sox9 gene. In ONE sentence, suggest where a mutation has occurred in the sex determination pathway to give rise to the four 46, XX, sry- brothers. F. Suppose that there is a RARE case of a fertile 46, XX, sry+ male. In ONE sentence, what will be the sex and genotype of the children this male can have?
Sri K.
Individuals with an XXY karyotype are ______ in humans and ______ in fruit flies. "male, male" "male, female" "female, male" "female, female" "male, intersexual"
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