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SEX-LINKED

Published on Feb 05, 2016

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1.

SEX-LINKED

GO TO THE SEX-LINKED SECTION OF YOUR PACKET
Photo by D H Wright
2.

Sex-Linked Traits: Because the X & Y chromosomes determine sex, the genes located on them show a pattern of inheritance called sex-linkage.

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Additional Notes

You may want to write this down.
4.

Humans have 23 pairs of chromosomes, so 46 total.

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5.

The 23rd pair of chromosomes are called the SEX CHROMOSOMES

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A Female has two X chromosomes. (XX)

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A male has an X chromosome and a Y chromosome (XY)

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8.

Colorblindness is a recessive trait found on the X chromosome.

Photo by Daniela Hartmann (alles-schlumpf)
9.

This is how you write the key.

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10.

Notice the Y chromosome does not have a letter on it!

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This is because the X chromosome carries the trait. Sex-linked traits are also called X-Linked traits.

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Lets do some examples together.

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Victoria Galegor

http://victoria.galegor@lsr7.net