Use a punnett square to determine the probability of a sex linked trait

Use a punnett square to determine the probability of

This preview shows page 6 - 7 out of 7 pages.

69.Use a punnett square to determine the probability of a sex-linked trait occurring in an individual. A woman carrying the gene for hemophilia is married to a hemophiliac. What percentage of their children will be expected tohave hemophilia? 70. What is the difference between sex-linked and sex-influenced traits? A sex linked trait is an allele carried on the X chromosome; sex-influenced traits are traits that are pronounced because of the sex of the individual. 71.Use a punnett square to determine the genotypes and phenotypes in problems dealing with multiple alleles. A man of blood type AB marries a woman of blood type A. What are the possible blood types of the offspring if the woman’s mother was type O? 72.Use a punnett square to determine the genotypes and phenotypes in problems dealing with codominance. What are the possible genotypes and phenotypes that result from the cross of a red horse and a white horse if hair color is a codominant trait?Works the same in horses. 73.Use a punnett square to determine the genotypes and phenotypes in problems dealing with incomplete dominance. What are the possible genotypes and phenotypes that result from the cross of a red snapdragon and a white snapdragon if color is an incompletely dominant trait? 74. State the laws of independent assortment and segregation. 75.What is gene linkage? How does gene linkage explain the observation that most people with red hair also have freckles?
Image of page 6
76.What is a mutation? What is the difference between a chromosomal mutation and a gene mutation? Give an example of each and tell what effects each may have.Any change in the DNA. Chromosomal – pieces or whole parts of chromosome involved. Gene – one or more bases may be involved. 77.List several causes of mutations. Include the definitions of carcinogens and mutagens.Chemicals, radiation. May cause cancer, may cause a mutation. 78.How is the effect of a sex cell mutation different than that of a somatic cell mutation?Sex cell mutations are passed on the next generation, not so with somatic (body) cell mutations. 79. Explain the dangerous mutations that occur in sickle cell anemia, Tay-Sachs disease, cystic fibrosis and hemophilia. Sickle-cell – shortness of breath, dizziness due to inability to get oxygen distributed due to malformed red blood cells, may also clot (crisis – painful). Tay-Sachs - damage to the brain and nerve cells from the buildup of fatty compounds. Cyctic fibrosis – build up of mucous Hemophilia – inability to clot blood 80.What is genetic variability? Explain the relationship between the following factors and genetic variability: sexual reproduction, mutation and genetic recombination during crossing-over.Difference in the genotype of parents, differences in gametes due to crossing over independent assortment during gamete formation. Mutation may cause a random change in the DNA.
Image of page 7

You've reached the end of your free preview.

Want to read all 7 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes