10 yeast mutants that are unable to make the amino acid histidine have been isol
ID: 53786 • Letter: 1
Question
10 yeast mutants that are unable to make the amino acid histidine have been isolated. Five of these (mutants 1,3,5,7, and 9) are of mating-type a and five of them (mutants 2,4,6,8, and10) are of mating-type alpha. A complementation test was conducted and the following results were obtained. + indicates the diploid was able to make histidine, and – indicates the diploid was unable to make histidine.
Mutant 1 3 5 7 9
2 + + + + -
4 + + + - +
6 + - - + +
8 + + + - +
10 + + + + +
Question 1 Eye color in fruit flies is determined by a gene on the X-chromosome. The dominant wild-type allele causes red color and the recessive white allele causes white color. A new recessive AllnKeu mulduon u causes green eye color has been identified. In a cross between a male with green eyes and a female with white eyes, all the male offspring have white eyes and all the females have green eyes. Which oft following islare most likely true? C a. the green and white mutations are alleles of two different genes (i.e., are non-allelic) C b. the green and white alleles fail to show complementation (i.e., are allelic) C c. the green allele is dominant to the white allele d. a and b Ce. a and c C f. b and c 1 points Save Answ Question 2 Use the information in the document named Post-OL6.info for questions 2-4', which is shown separately in 'assessments', to answer the following question: How many different complementation groups are there? 1 points Save Answ Question 3 Use the information in the document named Post-OL6.info for questions 2-4', which is shown separately in 'assessments', to answer the following question: True/false: Mutants 2 and 9 are showing complementation with each other rue False 1 points Save Answ Question 4 Use the information in the document named Post-OL6.info for questions 2-4', which is shown separately in 'assessments', to answer the following question: True/false: Mutants 1 and 2 are defective in different genes rue False 1 points Save Answ Question 5 Albinism is caused by a recessive mutation in humans. Two people who are albino have three children, all of whom are albino. True/false: This tells us that the two parents have recessive mutauoiS TO albinism in different genes True FalseExplanation / Answer
complementation test ;complementation occurs when two strains of organisms with diffrent homozygous recessive mutation that produce the same mutant phenotype ,it can also be done for cis -trans mutanat strains on different genes
1. Question 2 - option c
2. question 3 true
3. question 4 false
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