child psyc test2


Each human reprodcutive cell or gamete contains?


23 Chromosomes


when conception occurs 2 cells form?


a zygote


a zygote contains


23 chromosomes


the 46th chromosome dictates


the organisims genetic inheritence or genotype.


the 23 chromosome determines


the sex xx xy


phenotype


observable characteristics, appearance, personality,intelligene


genotype


a persons gentic inheritance


dizygotic twin


fraternal, have 1/2 genes in common


monozygotic twins


identical, rare origanate from one zygote, genotype the same


down syndrome


47 chromosomes instead of 46