NATS 1675 Lecture Notes - Lecture 15: Color Blindness, Zygosity, Melanin

• School: York University
• Department: Natural Science
• Course: NATS 1675
• Professor: Robert Crippen

Document Summary

Notes: turners syndrome only occurs on females. Some of the characteristics are male like but they are definitely females. May or may not have sperm productions. Autosomal inheritance: refers to the inheritance of characteristics that are carried on one of the 22 pairs (in humans) of autosomal chromosomes, not the sex chromosomes. Sex linked inheritance: refers to the inheritance of hemophilia characteristics, normally carried on the x- chromosomes. In fact, the y-chromosome carries very little genetic information. Heterozygous for a(cid:374)y trait (cid:373)ea(cid:374)s you"re a (cid:272)arrier. For females to be colour blind, their dad has to be colour blind as well. Example: albinism is the inability to produce melanin pigment, i. e, no pigment in the skin, hair or iris. The offspring from an albino and normal parents are always heterozygous. If parents with normal pigmentation produce an albino child, both parents must be heterozygous. All affected individuals have at least one affected parent;