BIOL 2500 Lecture Notes - Lecture 3: White2, Heredity, Lethal Allele

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 2500
• Professor: Roman D.Gietz

Document Summary

X, y & z, w, have different genes evolved from different autosomes. Like x-linked genes, z-linked genes give different results in reciprocal crosses. Example) non barrel female (zbw) * barred male (zbzb) The zz males have more dmrt1 than the zw females. There is a threshold once exceeded then testes develop. Up till now, traits have all been completely dominant eg. aa= aa. Co-dominance: the heterozygite exhibits phenotypes of both homozygotes. Human abo blood types blood cell surface antigans. Antigan molecule recognized by immune system, own antigans recognized as self and not reacted to. Ab (universal recipient: recognizes all types as self) O (universal donor: no antigans to react to) Another genetically controlled blood type and that is the rh factor. Score whether you have or don"t have the rh antigan. 8 alleles contribute but 1 primary locus (gene) If a mother is rh- and baby is rh+ (rh+ father)