Biology, 17.06.2020 16:57, alyssa0888
In fruit flies, the recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). The double mutant pr-cn combination has orange eyes. An F1 female who is wild-type is crossed to an orange-eyed male. Their F2 progeny have the following distributions:
Phenotype Observed
Wild-type 8
Brown 241
Bright-red 239
Orange 12
500
The F1 mother of these progeny (F2) resulted from a cross between two flies from true breeding lines (P generation). What are the genotypes of these two lines?
a. pr cn/prcn and prcn/prcn
b. prtcn/prcn and pr cn /prcn
c. prtan lpr cn and prcn/prcn
d. pren /prcn and pr cn/prcn
Answers: 1
Biology, 21.06.2019 20:00, kiki3002
Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.
Answers: 1
In fruit flies, the recessive pr and cn mutations cause brown and bright-red eyes, respectively (wil...
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