ANEQ 101 Lecture Notes - Lecture 3: Germ Cell, Mendelian Inheritance, Birth Weight
18 Sep 2016
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Mendel"s first law: the law of segregation, individual alleles are passed on separately and are separated into gametes (sperm & oocyte or egg, meiosis. The process that creates germ cells (sex cells) Germ cells (gametes) only one gene of a pair. Contain1/2 the number of chromosomes and 1/2 the number of genes of normal body cells: the number of gametes that can be obtained from a parental genotype depends on how heterozygous the genotype is. Mendel"s second law: law of independent assortment, alleles on different chromosomes are passed independently, no one combination occurs more frequently than another. Feed ef ciency, milk production: heritability, degree of resemblance between an individual"s phenotype and breeding value for a given trait, when phenotypic measure is good estimate of breeding value for a given trait, heritability is high. When phenotype is poor predictor of breeding value, then the heritability is low.
