10.05 Week 10 Quiz

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cc_profilecc.exam.v0p1qmd_assessmenttypeExaminationqmd_scoretypePercentagecc_maxattempts1

cc_profilecc.multiple_choice.v0p1Most of the traits expressed in a person's phenotype are determined byY chromosomes.X chromosome inactivation.autosomal genes.sex chromosomes.3100cc_profilecc.multiple_choice.v0p1A person who is heterozygous for a disorder caused by recessive alleles is a carrier of the disorder. A carrier is a person whodoes not have the disorder but can pass it on to offspring.can develop the disorder later in life but cannot pass it on.has a dominant normal allele that has been inactivated.passes the disorder to offspring on the Y chromosome only.5100cc_profilecc.multiple_choice.v0p1Genes that are located on sex chromosomes are calledalleles.recessive.XY.sex-linked.12100cc_profilecc.multiple_choice.v0p1Which statement is true of a sex-linked recessive gene?In an XY male, this recessive gene is always expressed.In an XY male, one copy is always inactivated.In an XX female, only one copy is needed for expression.In an XX female, it is always passed to offspring.13100cc_profilecc.multiple_choice.v0p1Unlike the traits studied by Mendel, most traits are produced by genes withsex linkage.only one allele.dominance and recessiveness.multiple alleles.20100cc_profilecc.multiple_choice.v0p1A plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. In the case of incomplete dominance, the flowers of the offspring will bered and white.white only.pink only.red only.23100cc_profilecc.multiple_choice.v0p1In the case of codominant alleles, a plant that is homozygous for red flowers that is crossed with a plant that is homozygous for white flowers will produce flowers that arered and white spotted.completely white.dark pink all over.pink and red.25100cc_profilecc.multiple_choice.v0p1Eye color, hair color, and skin color are polygenic traits. Polygenic traits result fromrecessive genes.many genes.codominant genes.epistatic genes.30100cc_profilecc.multiple_choice.v0p1Much of what we know about single-gene traits in humans is the result of studyingBritain's Royal Family.polygenic traits.genetic disorders.hemophilia.35100cc_profilecc.multiple_choice.v0p1What is the main difference between the carrier of a sex-linked disorder and the carrier of an autosomal disorder?Female carriers of an autosomal disorder pass the disorder to all offspring.All carriers of autosomal disorders have two dominant alleles for the disorder.The carrier of a sex-linked disorder is always female but does not have the disorder.Male carriers of a sex-linked disorder always have mothers who had the disorder.39100cc_profilecc.multiple_choice.v0p1A chart that traces the phenotypes and genotypes within a family is called apedigree.karyotype.Punnett square.chromosome map.41100cc_profilecc.multiple_choice.v0p1A genetic disorder is traced within a family. The disorder occurs mostly in males. The gene for this disorder is most likelynot sex-linked.on the X chromosome.an autosomal allele.carried only by males.46100cc_profilecc.multiple_choice.v0p1Which of the following types of genetic information can be identified easily with a karyotype?homologous chromosomesdominant traitsexact locations of genesrecessive alleles49100cc_profilecc.essay.v0p1qmd_computerscoredNoSuppose a colorblind male and a female with no recessive alleles for colorblindness have children. <ul> <li>What is the probablility they will have a colorblind son?</li> <li>What is the probability they will have a colorblind daughter?</li> </ul>100cc_profilecc.essay.v0p1qmd_computerscoredNoSuppose two plants with lavender flowers are crossed. About 25% of the offspring have white flowers, 25% have purple flowers and 50% have lavender flowers. Which of the following could explain these results: codominance, incomplete dominance, or multiple alleles. Explain your answer.100