Classical geneticists in the days before DNA analysis usually needed to work with traits showing complete penetrance. where the A-B genotypic class normally produces purple flowers and all other genotypic classes have white flowers.
a. If the parental generation is AA bb * aa BB what phenotypic ration do you expect in the F2 generation assuming complete penetrance ?
b. Suppose now that only 75% of A-B individuals have purple flowers (that is, the penetrance of this trait is 75%). What phenotypic ratio do you now expect among the F2 plants?
c. In doing these types of crosses, what kinds of results (other than an unexpected F2 ratio) might suggest that penetrance of the purple phenotype is incomplete?
Answers: 3
Biology, 22.06.2019 03:40
Organisms that successfully adapt will leave to grownone of the above
Answers: 1
Biology, 22.06.2019 05:30
What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?
Answers: 2
Biology, 22.06.2019 11:00
Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.
Answers: 1
Classical geneticists in the days before DNA analysis usually needed to work with traits showing com...
Mathematics, 09.12.2020 01:00
History, 09.12.2020 01:00
English, 09.12.2020 01:00
Health, 09.12.2020 01:00
Social Studies, 09.12.2020 01:00
Mathematics, 09.12.2020 01:00
Mathematics, 09.12.2020 01:00
Chemistry, 09.12.2020 01:00
Biology, 09.12.2020 01:00
Mathematics, 09.12.2020 01:00
Social Studies, 09.12.2020 01:00
Mathematics, 09.12.2020 01:00
Mathematics, 09.12.2020 01:00
Chemistry, 09.12.2020 01:00