(Rr = top right, rR = bottom left) Genetic Variation Variation of Traits 1 A Punnett square showing the cross between two pea plants is shown. In pea plants, the smooth coat allele (R) is dominant over the wrinkled coat allele (r). One part of the Punnett square is filled in, but the remainder is blank. Which of the following best describes the correct method for filling in the remainder of the squares? (Rr = top right, rR = bottom left) A RR = Rr = rR = B C D

The offspring receive one allele for each trait from each parent. Genetic Variation Variation of Traits 2 Which of the following best describes how genetic information is passed to offspring in sexual reproduction? A All of the offspring produced by two parents inherit identical versions of all genes. B The offspring receive one allele for each trait from each parent. C Each offspring receives all the genetic information from one of the parents. D Each trait is a blend of genes from each parent, halfway between them.

Two agouti mice can’t produce offspring with black fur. Genetic Variation Variation of Traits 3 An complete Punnett square here shows a cross between two mice with different fur color, agouti (A) and black (a). This Punnett square can be used to make which of the following conclusions? A Two agouti mice can’t produce offspring with black fur. B Eventually, all the mice that descend from this pair will have black fur. C The trait of agouti fur is an advantage to mice for avoiding predators. D The trait of agouti fur is dominant over the trait of black fur.

The diet and habitat requirements for each individual organism Genetic Variation Variation of Traits 4 The offspring of sexually reproducing organisms can be distinguished from the offspring of asexually reproducing organisms by studying which of the following? A The average amount of time involved between fertilization and birth of the offspring B The relative sizes in height of the organisms when they reach adulthood C The extent of variety in the genetic information in the population of offspring D The diet and habitat requirements for each individual organism 5 Two organisms that do not show a recessive trait can still produce offspring that show this trait under what conditions? A The recessive trait has an advantage for the offspring B The gene that carries the recessive trait undergoes a mutation C The male carries an allele for the recessive trait, but not the female D Both the parents carry one allele for the recessive trait