NATS 1675 Lecture Notes - Lecture 13: Y Chromosome, Chromosome, Peptide

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

Document Summary

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 chromosomes- refers to inheritance of characteristics normally carried on the x chromosome. None of these genes on the y chromosome is homologous to any of the genes on the x chromosome. In fact, the y chromosome carries very little genetic info. Autosomal recessive inheritance: parents lacking the characteristic in their phenotype can produce offspring displaying the characteristic, the characteristic often skips a generation, both sexes are affected with equal frequency. Autosomal dominant inheritance: all affected individuals have at least one affected parent, about one-half of the progeny (offspring) of an affected individual are also affected, both sexes are affected with equal frequency. Sex-linked recessive inheritance: parents lacking the characteristic in their phenotype can produce offspring with the characteristic, the characteristic often skips a generation, more males than females are affected.