Genetics Crosses Ch. 9.2 (p.172-178) Genotype = the genetic makeup of an organism (the genes you have) The alleles inherited from the parents for each trait This includes both dominant and recessive alleles T = allele for smooth texture seed ; t = allele for wrinkled texture Suggest abbreviations for the following traits: Widow’s Peak Hairline (dominant) = _____ Strait Hairline (recessive) = _____

Genetics Crosses Ch. 9.2 (p.172-178) Genotype = the genetic makeup of an organism (the genes you have) The alleles inherited from the parents for each trait This includes both dominant and recessive alleles T = allele for smooth texture seed ; t = allele for wrinkled texture Suggest abbreviations for the following traits: Widow’s Peak Hairline (dominant) = _W_ Strait Hairline (recessive) = __w_

Genetics Crosses Ch. 9.2 (p.172-178) Phenotype = the physical expression of the genes, or what the organism looks like Dominant allele always expressed (written as CAPITAL LETTER) Recessive allele only expressed if no dominant to block it (lowercase letter)

Genetics Crosses Ch. 9.2 (p.172-178) Homozygous = Both alleles for a characteristic are the same (TT or tt) Heterozygous = 2 alleles for a characteristic are different (Tt or tT) Probability = chance of something happening Can a recessive Phenotype by homozygous, heterozygous, or both?

Genetics Crosses Ch. 9.2 (p.172-178) Punnett Square = diagram used to predict the probability of genotype inheritance Example with seed texture crossing pure smooth seed plant (TT) with pure wrinkled plant (tt)

Genetics Crosses Ch. 9.2 (p.172-178)

Genetics Crosses Ch. 9.2 (p.172-178)

Genetics Crosses Ch. 9.2 (p.172-178)