HLTB20H3 Lecture Notes - Lecture 4: Dominance (Genetics), Diastrophic Dysplasia, Achondroplasia
Document Summary
Like tay-sachs, heterotaxy (x-linked recessive disease) only combination would be heterozygous female (xhxh x xhy) Individuals die at the age of 2 or 3 it"s not possible for males to have this condition. Heterozygous females can have some displacement of their organs: if it"s females, then they are more likely to die. You would only have sons in this case. #2 xrh-xrh- - it"s not an x-linked trait; this shouldn"t have been done: needed to research what rh is, none of the blood type groups are x-linked, all autosomal. Mendel did not receive any recognition at first. Because the math was so simple, it was a reason why other naturalists didn"t believe in his theories and laws: and there were no evidence of heritable factors. May be a huge environmental impact with little genetic influence or vice versa. Because he was just looking at phenotypes, it was hard to think about the genetic component back then.
