PSY-B - Psychology PSY-B 320 Lecture Notes - Lecture 5: Somatic Cell, Chorea, Congenital Disorder
19 Jan 2017
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Genes, cells, and behavior (cid:894)your (cid:862)e(cid:454)pressed(cid:863) traits, or the outward (cid:373)a(cid:374)ifestatio(cid:374) of (cid:455)our ge(cid:374)ot(cid:455)pe(cid:895: genomics: Nucleus of each human somatic cell contains 23 pairs of chromosomes, or 46 in all. One member of each pair of chromosomes comes from the mother, and the other member comes from the father. The chromosome pairs are numbered from 1 to 23. Chromosomes and genes: human somatic cells have 23 pairs of chromosomes. Chromosome pairs 1 through 22 are called autosomes, and they contain the genes that contribute most to our physical appearance and behavioral functions. The 23rd pair comprises the sex chromosomes, which contribute to our physical and behavioral sexual characteristics. Dominant and recessive alleles: dominant allele, recessive allele. The member of the gene pair that is routinely expressed. The member of the gene pair that is routinely unexpressed. O(cid:374)l(cid:455) the do(cid:373)i(cid:374)a(cid:374)t allele"s trait is e(cid:454)pressed i(cid:374) the phe(cid:374)ot(cid:455)pe. The phenotypic expression of the do(cid:373)i(cid:374)a(cid:374)t allele"s trait is only partial: complete dominance.
