A Human Individual Has a Karyotype That Is XY but Is

question 18

Multiple Choice

A human individual has a karyotype that is XY but is phenotypically female.An explanation for this could be

• A) a deletion of the Sry gene on the Y chromosome, thus resulting in an female phenotype.
• B) a translocation of the Sry gene to one of the X chromosomes has occurred, thus resulting in a female phenotype.
• C) the Sry gene has been amplified 10 fold on the Y chromosome.
• D) sex is determined by genes located on autosomes, not sex chromosomes.

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Definitions:

Countercurrent Exchange

A mechanism in which fluids flow in opposite directions, exchanging properties (such as heat or chemical constituents) to maximize transfer rates.

Gills

Respiratory organs in certain aquatic organisms, allowing them to extract oxygen from water.

Gases

Substances that are in the state of matter characterized by having neither a defined volume nor shape, expanding to fill their container.

Terrestrial

Terrestrial refers to things relating to the Earth or living or growing on land as opposed to water or air.