WCH Exam #1 F 2/16 in WCH (bring cheat sheet) Review Th 2/15 at 5pm in GRG 102

haploid diploid X 23 in humans X 23 in humans X 23 in humans Inheritance = The interaction between genes inherited from Mom and Dad.

Do parents’ genes/traits blend together in offspring? CB 14.10

CB 14.3 In many instances there is a unique pattern of inheritance. Traits disappear and reappear in new ratios.

CB 14.6 GenotypePhenotype

Human blood types AA or AO AB BB or BO OO CB tbl 14.2

CB 14.5 Predicting the genetic future

Mom = ABDad = AB Inheritance of blood types

Human Diploid Chromosomes AB

Mom = ABDad = AB Gametes:A or B Inheritance of blood types

Mom = ABDad = AB Gametes: A or B AA ABBB AB Chance of each phenotype for each offspring 25% AA 50% AB 25% BB Mom Dad Inheritance of blood types

CB 14.6 PhenotypeGenotype Genes code for proteins (or RNA). These gene products give rise to traits…

CB 14.6 PhenotypeGenotype Genes code for proteins (or RNA). These gene products give rise to traits… It is rarely this simple.

CB Single genes controlling a single trait are unusual. Inheritance of most genes/traits is much more complex… Dom.Rec. Dom.

Incomplete Dominanace CB 14.10

Human blood types AA or AO AB BB or BO OO CB tbl 14.2 Codominance

Eye color: One trait controlled by multiple genes

Human Chromosomes

CB 15.9 Sex determination is normally inherited by whole chromosomes or by number of chromosomes.

CB 15.9 X/Y chromosomes in humans

All humans develop as females for the first 9 weeks of development

CB Sex-linked traits: Genes on the X chromosome No one affected, female carriers 50% of males affected, 50 % female carriers 50% affected, female carriers A= normal ; a= colorblind

Color Blind Test

Sex-linked traits: Genes on the X chromosome No one affected, female carriers A= normal; a= colorblind colorblind normal

Sex-linked traits: Genes on the X chromosome 50% of males affected, 0 % females affected A= normal; a= colorblind normal

Sex-linked traits: Genes on the X chromosome 50% males affected, 50% females affected A= normal; a= colorblind colorblind normal

CB Sex-linked traits: Genes on the X chromosome No one affected, female carriers 50% of males affected, 50 % female carriers 50% affected, female carriers A= normal ; a= colorblind

CB 15.9 X/Y chromosomes in humans

105 males : 100 females (live births) Why?

105 males : 100 females (live births) Why?