01:830:331 Study Guide - Midterm Guide: Paramesonephric Duct, Fallopian Tube, Y Chromosome
1 Oct 2016
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Every cell has 23 pairs (46 chromosomes each); called autosomes: how many chromosomes do human sex cells have? (and why is this different from body cells?) Human sex cells have 2 sex cells, sex chromosomes. These are either x or y, depending on gender. Genes that can produce alternative expressions of a characteristic o. Alleles are alternate versions of the same gene: recognize examples of homozygous and heterozygous genotypes. A child who"s homozygous for a dominant dimples allele will have dimples, but so will a child who is heterozygous for that same allele. Since it"s dominant, the dimples expressed, and the recessive no dimple allele is hidden: what is polygenic inheritance? (you should know terms and definitions from all of the slides. ) Patterns of inheritance in which multiple genes at different sites on chromosomes affect a complex trait: when do male and fetuses begin to look different? (and what do they look like before then, in terms of sex.
