Genetics and Heredity Predicting Genotypes and Phenotypes using

Genetics and Heredity Predicting Genotypes and Phenotypes using

Genetics and Heredity Predicting Genotypes and Phenotypes using the Punnett Square Objective Recognize genotypes and phenotypes and predict genetic outcomes of an animal through use of the Punnett Square.

Gene The basic physical unit of heredity Taken from: www.topnews.in Chromosomes

Long strands of DNA and associated proteins present in the nucleus of every cell Taken from: www.wmworia.wordpress.com Locus

The specific location of a gene on a chromosome. Allele Any of the possible forms in which a gene for a specific trait can occur. Ex: A, a

Genotype The genetic constitution of an organism. Determines the phenotype. www.biotechlearn.org.nz

Phenotype Physical characteristics of an animal. Examples: -Horned/Polled -Black/Red

jandbcattlecompany.com Homozygous A one-locus genotype containing functionally identical genes. Example: -BB, bb, GG, gg

Heterozygous A one-locus genotype containing functionally different genes. Example: -Rr, Gg, Bb Dominant

A gene that is expressed phenotypically. Example: -Black / Red -Brown / Blue Taken From: www.learnscape.org

Recessive A gene that is phenotypically expressed in the homozygous state but has its expression masked in the presence of a dominant gene. The weaker gene Punnett Square

B B B BB

BB b Bb Bb

B=Black b=Red

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