Genetics Review

Know the following Terms: Recessive Dominant Probability Hybrid Purebred Phenotype Genotype

Crossing one trait In rabbits, black fur is dominant over white fur. A hybrid black fur rabbit is crossed with a purebred white fur rabbit What is the genotypic ratio? What is the phenotypic ratio?

B b What % are white? What % are black? b Bb bb

Crossing two traits In rabbits, black fur is dominant over white fur and short fur is dominant over long fur. A hybrid black fur, hybrid short fur is crossed with a hybrid black fur, hybrid short fur.

Crossing two traits BbSs x

Dominant or recessive? Autosomal or X-linked?

Dominant or recessive? Autosomal or X-linked?

This diagram shows the results of some of Gregor Mendel's cross-breeding experiments with peas. Identify the list that includes only recessive characteristics.

In a certain plant, 'Y' represents the allele for yellow flower color and 'y' represents the allele for white flower color. A yellow flower on this plant was found to have the genotype 'Yy'. Another yellow flowering plant was found to have the genotype 'YY'. Identify which of the following statements is true.

This diagram shows some colors for shorthorn cattle This diagram shows some colors for shorthorn cattle. Identify the correct statement for the roan cow.

In snapdragons the allele R produces red flowers and allele W produces white flowers. The genotype RW produces pink flowers. Pure-breeding red-flowering snapdragons are crossed with pure-breeding white-flowering snapdragons. Calculate the proportion of snapdragons with pink flowers in the F1 generation.

Identify the correct relationship between the two people who had children in generation III.

This pedigree shows a recessive inherited condition as the dark purple color in a square or circle. Male 2 has the condition but his wife does not. Identify the correct statement for their children.

This table shows the genotypes and phenotypes for the ABO blood groupings in humans. A mother with blood group B has a child with a father having blood group A. Identify the possible blood groups the child could have.

This table shows the genotypes and phenotypes for the ABO blood groupings in humans. Blood groups can be used to determine parentage of children. A child has blood group O. The child's father has blood group A and the mother has blood group B. Identify the genotypes of each parent