PSY 361 Chapter Notes - Chapter 3: Chromosome, Skin Fold, Down Syndrome
16 Oct 2016
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Dominant vs. recessive genes , mendel did an experiment with green and yellow peas and fou(cid:374)d out (cid:449)hi(cid:272)h (cid:862)ge(cid:374)es(cid:863) (cid:449)ere do(cid:373)i(cid:374)a(cid:374)t a(cid:374)d (cid:449)hi(cid:272)h o(cid:374)es (cid:449)ere re(cid:272)essi(cid:448)e (cid:271)/t shape (rou(cid:374)d / withered ) and color (yellow / green). *alleles: two or more alternative forms of a gene that can occupy the same position on paired chromosomes and affect the same trait . *homozygous: have two identical alleles for the same trait . *heterozygous: have different alleles for the same trait. *dominant inheritance: pattern of inheritance in which , when a child receives two different alleles , only the dominant one is expressed. *recessive inheritance: receive identical recessive alleles which results in a non-dominant trait. *polygenic inheritance: pattern on inheritance in which multiple genes at different sites of on chromosomes affect a complex trait. *mutations: permanent alterations in genes or chromosomes that usually produce harmful characteristics but provide the raw material of evolution.
