Agenda 1. Genetics Notes 2. Practice Problems 3. Spongebob handout Warm-Up Question In Floobies red hair (R) is dominant to blue hair (r). If a red hair Floobie that is heterozygous mates with a blue hair Floobie, what percentage of the baby Floobies will have blue hair?

Law of Segregation Before meiosis, the original parent cell has 2 of every allele. During meiosis, the parent cell divides to form a gamete (sperm or eggs) which have only 1 of every allele.

E = brown eyesH = black hair e = blue eyesh = red hair eheh EHEH EhEh eHeH EHEH eheh EhEh eHeH

Law of Independent Assortment The separation of one pair of alleles is not influenced by the separation of another pair of alleles.

Generation All the individuals and offspring born and living at the same time.

Sex-Linked Traits Genes for these traits are carried on the sex chromosomes.

Examples of Sex Linked Traits Carried on the X chromosome: Red Green Color Blindness Male Pattern Baldness Hemophilia

Inability to stop bleeding.

Are You Color Blind?

What do you see?

Sex-Linked Genetics If a color blind man and a woman that is homozygous for normal color vision have a child, what is the chance they will have a color blind child? X XX Y BBb

X Y B X b X B X B X B X B X B X b X b Y Y

Sex-Linked Genetics If a man with normal color vision and a woman that is a carrier (heterozygous) for normal color vision have a child, what is the chance they will have a color blind child? X XX Y BbB

X Y B X B X b X B X b X B X B X b X B Y Y What is the chance a son will be color blind? What is the chance a daughter will be color blind? 50% 0%