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Genetics Study of heredity Mendel and pea plants Fertilization- sperm and egg join

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Trait Ex. eye color, height Hybrids- crosses between parents are true-breeding types

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Gene- sequence of DNA that codes for a specific trait Ex. Eye color Allele- version of a gene Ex. blue eye color Diploid organisms have two alleles

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Types of Alleles Dominant Recessive

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Mendels Principle of Segregation: Two members of a gene pair segregate (separate) from each other during the formation of gametes. Animation of Segregation

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Mendels Principle of Independent Assortment: Alleles for different traits assort independently of one another. Genes on different chromosomes behave independently in gamete production.

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Diploid- 2 sets of chromosomes Haploid- 1 set of chromosomes -Gametes

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Genotype Ex. BB Phenotype Ex. Brown eyes

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Homozygous Heterozygous

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Monohybrid cross

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Dihybrid Cross

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Genetics Laws Independent Assortment Segregation

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Shape of Earlobe Recessive Dominant

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Eye Color DominantRecessive

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Shape of Hairline DominantRecessive

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Tongue Roll DominantRecessive

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Tongue Fold Recessive Dominant

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Shape of Little Finger Recessive Dominant

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Hair on Middle Joint Recessive Dominant

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Hair Color Recessive Dominant Red Hair Any shadeAny Other Color Hair

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Hair Type Dominant Recessive

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Eyelash Length Recessive Dominant

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Number of Fingers Recessive Dominant

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Cleft Chin Recessive Dominant

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Dimples Dominant Recessive

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Freckles Dominant Recessive

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Hand Clasping Dominant Recessive 55% of People 45% of People