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Homologous Pairs of Chromosomes in Human Somatic Cells

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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

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Page 1: Homologous Pairs of Chromosomes in Human Somatic Cells

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

Page 2: Homologous Pairs of Chromosomes in Human Somatic Cells

Homologous Chromosomal Pair (unreplicated)

Homologous Chromosomal Pair (replicated)a.k.a. – tetrad (four chromatids)

Page 3: Homologous Pairs of Chromosomes in Human Somatic Cells

Page 4: Homologous Pairs of Chromosomes in Human Somatic Cells

Actual human chromosome pairs (22 autosomal pairs and 1 pair of sex chromosomes)from a somatic (body) cell (diploid, 2n = 46)

Page 5: Homologous Pairs of Chromosomes in Human Somatic Cells

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

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