11.1 bio Flashcards
Genotype
an individual’s allele combination
phenotype
the visible trait that alleles cause
homozygous
both the same allele
heterozygous
two different alleles
Dominant vs recessive
dominant- only takes one T allele to make a protein that causes the tall phenotype no matter what the other allele is
recessive- takes two t alleles to cause the short phenotype
Explain how a test cross works
breeding the individual in question with a known homozygous recessive individual, and observing the phenotypes of the offspring.
Contrast genotype and phenotype ratios in traits that are dominant/recessive vs. codominant
homozygous dominant (AA) and heterozygous (Aa) individuals have the same phenotype, while homozygous recessive (aa) individuals have a different phenotype.