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In fruit flies, the gene for eye color is located on the X chromosome, and the red eye allele (R) is dominant to the white eye allele (r). A female fly with genotype XRXr is mated with a male fly with genotype XrY. Which of the following statements best describes the expected outcome of the cross? Make a Punnett Square to answer the question.
Lisa learned that blue eye color is a recessive trait and brown eye color is a dominant trait. Lisa and her sister, Sara, both have blue eyes. Her parents, Joan and Greg, both have brown eyes. Lisa drew her family pedigree beginning with both sets of grandparents.
Select ALL of the following statements about Sara and Lisa’s pedigree that are not true. (3 choices)
Which blood genotype is an example of codominant inheritance?
In snapdragons, the allele for red flower color (CR) is incompletely dominant to the allele for white flower color (CW). Snapdragons that are heterozygous for flower color have a pink phenotype. Which of the following crosses could yield all three flower color phenotypes (red, white, and pink) among the offspring? Make a Punnett square to answer the question.
A red rose bush cross-pollinates a whit rose bush. The offspring have white flowers with red streaks. What type of inheritance is this?
The transmission of a genetic disorder is shown in the pedigree below.
According to the pedigree, what is the mode of inheritance for this disorder?
A gardener crossed a plant with red flowers with a plant that had white flowers. The offspring plants had pink flowers. What is the most likely genetic reason for these differences in color?
Analyze the pedigree below. Match the following answers with their corresponding question.
How many generations are shown in this pedigree?
How many kids did I-1 and I-2 have?
How many of I-1 and I-2 kids are boys?
How are I-2 and III-1 related?
In certain species of roses, white roses and red roses are incompletely dominant to each other. When a red rose and a white rose are crossed, a pink rose is produced. What is the probability of producing a white rose when a red rose is crossed with a pink rose?
Colorblindness is a sex-linked recessive trait in humans.
If a colorblind daughter is born to a couple, which Punnett square represents the probable genotypes of the parents?
Use the table below to answer the question.
An individual has type AB blood. His father has type A blood and his mother has type B blood. What is the individual’s phenotype an example of?
A researcher crosses the F1 generation of two snapdragon plants. According to this information, what is the ratio of their offspring (F2)?
A scientist observes that a certain trait is determined by a single allele. An organism inherited one version of the trait from one parent and another version from the other parent. Both versions of the trait are expressed in the phenotype of the offspring. Which pattern of inheritance best classifies the observed trait?
The phenotypes and genotypes for feather color in a certain chicken species are shown in the chart below.
What are the possible phenotypes of offspring produced when a rooster with black feathers is crossed with a hen that has speckled feathers?
Which of the following is an example of codominance in genetic traits?
This Punnett square shows the inheritance of flower color in snapdragon flowers.
Which statement BEST explains the inheritance of flower color in snapdragons?
Match the following definitions with their corresponding term.
Genes and the Environment
A red rose bush cross-pollinates a white rose bush. The offspring have red flowers with white streaks. What type of inheritance is this?
Female cattle that have white coats are crossed with male cattle that have red coats. Both male and female offspring have roan coats, which are coats with both red and white hairs. This represents what type of non-mendelian genetics?