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In Drosophila, the following genes and mutations are known: Wing size – recessive allele for tiny wings – t; dominant allele for normal wings – T Eye shape – recessive allele for narrow eyes – d; dominant allele for normal (oval) eyes – D Eye color – recessive allele for white eyes – r; dominant allele for normal (red) eyes – R The following cross is performed and the offspring analyzed – TtDdRr X Ttddrr.  Give the probabilities for generating the following offspring a. Flies with at least two recessive traits -  Write your answer as a reduced fraction - e.g. 1/8   b. A trihybrid cross is now performed and the offspring analyzed. What is the probability of getting abnormal flies except for the eye shape which will be normal  -  Write your answer as a reduced fraction - e.g. 1/8

In Drosophila, the following genes and mutations are known: Wing size – recessive allele for tiny wings – t; dominant allele for normal wings – T Eye shape – recessive allele for narrow eyes – d; dominant allele for normal (oval) eyes – D Eye color – recessive allele for white eyes – r; dominant allele for normal (red) eyes – R The following cross is performed and the offspring analyzed – TtDdRr X Ttddrr.  Give the probabilities for generating the following offspring a. Flies with at least two recessive traits -  Write your answer as a reduced fraction - e.g. 1/8   b. A trihybrid cross is now performed and the offspring analyzed. What is the probability of getting abnormal flies except for the eye shape which will be normal  -  Write your answer as a reduced fraction - e.g. 1/8

Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter13: Genes, Chromosomes, And Human Genetics
Section: Chapter Questions
Problem 8TYK: Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene...
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 In Drosophila, the following genes and mutations are known:

  • Wing size – recessive allele for tiny wings – t; dominant allele for normal wings – T
  • Eye shape – recessive allele for narrow eyes – d; dominant allele for normal (oval) eyes – D
  • Eye color – recessive allele for white eyes – r; dominant allele for normal (red) eyes – R

The following cross is performed and the offspring analyzed – TtDdRr X Ttddrr.  Give the probabilities for generating the following offspring

a. Flies with at least two recessive traits -  Write your answer as a reduced fraction - e.g. 1/8

 

b. A trihybrid cross is now performed and the offspring analyzed. What is the probability of getting abnormal flies except for the eye shape which will be normal  -  Write your answer as a reduced fraction - e.g. 1/8

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