bio notes12

bio notes12 - Homozygous-having 2 identical alleles for a...

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Homozygous-having 2 identical alleles for a trait -AA or aa or IaIa or IbIb or ii Heterozygous-having different genes (alleles) for a trait -Aa or IaIb or IaIi or IbIi Genotype-genetic makeup of an individual Phenotype-physical manifestation of a trait (how it appears)/(physical appearance) -Determined by genotype Dominant alleles-an allele that is fully expressed in the phenotype of a heterozygote -Only a single copy is required to express the trait -Represented by a capital letter (A) Recessive alleles-allele in a heterozygous individual; the allele that is completely masked (not expressed) in the phenotype. -Represented by a lowercase letter (a) -Not expressed because it has inactive/defective enzyme Generations-P (parental)/ F1 (filial one-offspring of the parental generation/hybrids)/ F2 (filial two-offspring of cross between F1 individuals) Mendel’s First Law-the two members of a gene pair segregate (separate) from each other into the gametes. Each gamete carries one member of the gene pair. Separation occurs (homologous chromosomes separate during anaphase I of
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bio notes12 - Homozygous-having 2 identical alleles for a...

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