You are a breeder of Labrador retrievers. You cross two blank labs that may not
ID: 59145 • Letter: Y
Question
You are a breeder of Labrador retrievers. You cross two blank labs that may not be from pure-breeding stock. Which of the following results are possible among the puppies? The maximum observed frequency of recombination between two genes is 50% You isolate two strains of fruit files that have different mutations in the same gene. Your graduate student raises are very large number of files from a cross between these two strains. Out of 5000 files raised, 3 are wildtype and the rest are mutant. What do you conclude? cM refers to centiMorgans or map units. In Drosophila, wildtype is dominant to back (b) and normal winged is dominated to vestigial(vg). A cross between wildtype female, hetrozygous for both traits, and a black vestigial male produces the following offspring. Use this information to answer question 10 and 11. The gene arrangement of the female in this cross is In the abovementioned cross what is the map distance between black and Vestigial? A dihybrid cross reveals a 9:3:4 phenotype ratio among the offspring. What is the likely cause of this result? Drosobila eyes are normally red. You indentify two orange eyed strains and demonstrate that the orange allele is inherited as an autosomal recessive. To determine if the two orange mutations are alleles at the same gene you conduct a complementation test. If the orange mutations are in the same gene the F_1 is expected to be A trait that is haplo-sufficient is inherited as aExplanation / Answer
7. b (black and brown)
8. a (true)
9.c
10.b
11.e
12.d
13.b
14.d(lethat)
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