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Homologous Pairs of Chromosomes in Human Somatic Cells. Homologous refers to chromosomes that are the same size, shape, and have the same set of genes occupying the same locations (loci; singular = locus) on each chromosome. Homologous Chromosomal Pair ( unreplicated ). - PowerPoint PPT Presentation
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Homologous Pairs of Chromosomes in Human Somatic Cells
Homologous refers to chromosomes that are the same size, shape, and have the same set of genes occupying the same locations (loci; singular = locus) on each chromosome
Homologous Chromosomal Pair (unreplicated)
Homologous Chromosomal Pair (replicated)a.k.a. – tetrad (four chromatids)
Actual human chromosome pairs (22 autosomal pairs and 1 pair of sex chromosomes)from a somatic (body) cell (diploid, 2n = 46)
or
Human chromosomes (22 autosomal and 1 sex chromosome)from a gametic (germ, reproductive) cell (haploid, n
= 23)
Either “X” or “Y” found in sperm; only “X” found in egg