| A | B |
|---|
| GIVEN: Ff X Ff (__% freckled expected) | 75% |
| Ff X ff (__% freckled expected) | 50% |
| Ff X Ff (__% unfreckled expected) | 25% |
| FF x ff (__% unfreckled expected) | 0% |
| FF X Ff (__% freckled expected) | 100% |
| FF X ff (ratio of freckled : unfreckled) | 1:0 |
| FF X Ff (ratio of unfreckled : freckled expected) | 0:1 |
| Ff X Ff (ratio of freckled : unfreckled expected) | 3:1 |
| Ff X Ff (ratio of unfreckled : freckled expected) | 1:3 |
| Ff X ff (ratio of freckled : unfreckled expected) | 1:1 |
| dominant allele/gene | represented by capital letter |
| expressed even if only one is in genotype | dominant allele |
| recessive allele | represented by lower case letter |
| expressed only if two copies in genotype | recessive allele |
| expressed trait | phenotype |
| phenotype | the way an organism looks |
| genotype | two genes/alleles an organism has for a trait |
| two letter abbreviation of genes or alleles | genotype |
| heterozygous | two different alleles for a trait |
| Ff is an example of a ____ | heterozygous genotype |
| homozygous | two identical alleles for a trait |
| ff and FF are examples of ____ | homozygous genotypes |
| pedigree | like a family tree |
| shows what traits have already been passed | pedigree |
| punnett square | predicts what traits might be passed |
| predicts percentages and ratios of offspring traits | punnett square |
| sex-linked trait | gene located on X chromosome only |
| colorblindness & hemophilia | examples of sex-linked traits |
| XX | represents females |
| represents females | circle on a pedigree chart |
| XY | represents males |
| represents males | square on a pedigree chart |
| half-shaded circle on pedigree chart means | carrier female |
| carrier female | doesn't show trait but has a recessive gene for it |
