University:
Missouri State University
Course:
BIO 235 | Genetics
Academic year:

2019
Views:

222

Pages:

2
Author:

ilikemyicons0y5

Name Pedigrees Practice In humans, albinism is a recessive frait. The disorder causes a lack of pigment in the skin and hair, making an albino appear very pale with white hair and pale blue eyes. This disorder also occurs in animals, a common albino found in a laboratory is the white rat. The pedigrees below trace the inheritance of the allele that causes albinism. 1. Given the following genotypes, describe the phenotypes (normal or albino) 7. Fill out the blanks of the pedigree below (AA, Aa, aa) AA Aa aa Albing Normal Normal 2. Fill out the blanks on the pedigree below. Aa A aa A Aa A AA Aa Aa aa aa Au aa A AL 3. How many children does this family have? 3 What are the sexes of the children? F 8. How many children does the original couple have? 9. How many grandchildren? Aa, or aa) 4. Fill out the blanks of the pedigree below (AA, Aa aa 10. Rats can produce a lot more offspring than humans, making a pedigree more difficult to manage. A researcher has four female white rats named April, May, June, and July. One night, the cage was left open in the lab and a brown rat got into the female's cage. Six weeks later, the rats had litters of babies of varying colors. Two of the offspring managed to reproduce before the researcher was able to sort out the mess. Determine genotypes of the rats in this pedigree. May aa Manny Aa aa Aa Aa A Ac Aa Aca aa June aa April July aa Aa aa 5. How many children does the original couple have? 6. How many grandchildren does the original couple have? What is the sex of the grandchild? M Pedigree Worksheet Name Hh nh Block Key! Date 1 11 Hh 2 2 hn 5 Huntington's Disease Hh Hh n 1. Which members. of the family above are afflicted with Huntington's Disease? I1, I2,3,7, IⅢ3 2. There are no carriers for Huntington's Disease- you either have it or you don't. With this in mind, is Huntington's disease caused by a dominant or recessive trait? Dominant. 3. How many children did individuals 1-1 and 1-2 have? 4. How many girls did II-1 and II-2 have? 23 How many have Huntington's Disease? 16 uncle meice 5. How is individual III-2 and 11-4 related? Coomabao 1-2 and 111-57 Chordmurther errandson 6. The pedigree to the right shows the passing on of long index finger in a family. Is this trait dominant or recessive? recessive 7. How do you know? Either ff1 Ⅲ- needs to have it. 2 8. How are individuals III-1 and III-2 related? Cousins / manied 11 3 4 9. Name 2 individuals that have a long index finger. 1+3 23 4 IV 10. Name 2 individuals that were carriers of long index finger gene.1-2 H 112 3 11. Is it possible for individual IV-2 to be a carrier? NO Why? MACLLO 12. The pedigree to the right shows the passing on of colorblindness. What sex can ONLY be carriers of colorblindness? Femalus 13. With this in mind, what kind of non-mendelian trait is colorblindness? X-linked 14. Why does individual IV-7 have colorblindness? They recieved alule hum momt Dad 15. Why do all the daughters in generation Il carry the colorblind gene? received frumdau 11 16. Name 2 IV generation colorblind males. 15 IV 1 2 3 4 6 7