Genetics and Fertilization

Genetics and Fertilization - Single gene pair i Some...

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Genetics and Fertilization Gametes o Ova (singular:ovum) – egg cell – all present at birth – largest human cell o Sperm – several billion per month (tiny – tail 6 times longer than body) – sperm determines gender Zygote – when sperm and egg comes together o Called morula when it’s a cluster of cells Can split into 2 morula’s – twins DZ – dizygotic twin – double ovulation and fertilization MZ – monozygotic twins: from one zygote morula splits Mechanisms of heredity a.
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Unformatted text preview: Single gene pair i. Some characteristics are influenced by only one pair of genes – one from mother, one from father (alleles) ii. Behave in a pattern of dominance and recessiveness b. Sex-linked genes (or X linked) c. Polygenic inheritance – characteristics are influenced by multiple genes, ex intelligence, temperament d. Multifactorial – genes + environment together influence a characteristic ex. Height, intelligence, diabetes Father is always on top for punnet squares...
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This note was uploaded on 03/16/2010 for the course CDE 22222 taught by Professor Vanvleet during the Spring '10 term at Arizona.

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Genetics and Fertilization - Single gene pair i Some...

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