Sex–Linked Inheritance Mrs. Stewart Honors Biology Central Magnet School.

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Presentation transcript:

Sex–Linked Inheritance Mrs. Stewart Honors Biology Central Magnet School

Sex – Linked Traits Male and Female genotypes

Who determines the sex of the baby? What allele will mom pass on to baby? Hint: There’s only one possible What allele will dad pass on to baby? So, who ultimately determines the sex of baby?

How is sex determined? X Y

Not just sex determination The X and Y chromosomes contain the genes that determine male or female sex characteristics BUT WAIT, THAT’S NOT ALL! The X chromosome contains alleles for other characteristics

The X-Chromosome Hemophilia Color blindness Baldness Duchenne Muscular Dystrophy These X-linked recessive disorders will predominantly affect males. Why?

Pipe Cleaner Babies Activity