Bio 181 Chapter 13 with 100% correct answers

Bio 181 Chapter 13Sex Chromosomes - correct answer X (large) and Y (small) -only the ends of the Y chromosome have regions that are homologous with corresponding regions of x chromosomes SRY Gene - correct answer required for development of testes -sex determining region y protein Ovum - correct answer contains an x Sperm - correct answer can contain an x or y Sex-Linked Gene - correct answer gene located on either sex chromosome -50 to 60 Y-linked genes (found on Y chromosomes) -800 to 900 X-linked genes (found on X chromosomes) X-Linked Genes - correct answer mostly genes unrelated to sex Y-Linked Genes - correct answer mainly genes that encode sex determination X-Linked Inheritance - correct answer for a recessive X-linked trait to be expressed, 2 alleles are needed in a female (XnXn) -a male needs only one copy of the allele (hemizygous XnY) X-Linked Recessive Disorders - correct answer more common in males than females XNXN XNXn <- carrier