Can someone please help with this question, this is the only question that is pu
ID: 60082 • Letter: C
Question
Can someone please help with this question, this is the only question that is puzzling me.
Question :On a newly discovered island in the south pacific. A geneticist found two distinct pure breeding populations of frogs:
Strain 1: the frogs have purple eyes and croak by uttering rib-it, rib-it (utterers)
Strain 2: the frogs have green eyes and croak by muttering knee-deep, knee-deep (mutterers)
She mates frogs from the two lines producing f1 frogs that wers all utterers with blue eyes. A large f2generation then yielded the following ratio:
27/64 blue , utterers
12/64 green, utterers
9/64 blue, mutterers
9/64 purple, utterers
4/64 green, mutterers
3/64 purple,mutterers
A.) how many total gene pairs are involved in the inheritance of both eye color and croaking?
B.) of these, how many control eye colorand how many control croaking?
C.) assign gene symbols for ALL the gene pairs and give the genotypes of the parental f1 and the genotypes for all of the 6 f2 phenotypes
D.) after many years the same geneticist isolates true breeding lines of all the 6 f2 phenotypes. Give the f1 and f2 phenotypic ratios of a cross between a blue mutterer and a purple utterer.
Explanation / Answer
A. five gene pairs
B. 3 control eye color and 2 control croaking
C. Let the gene symbol for Purple beXpXp and that for green be Xg Xg. The symbol for blue will be XpXg
The symbol for uttering be UU and muttering be uu
The genotype of F1 parent will be XpXp UU crossed with Xg Xg
F1 will be Xp Xg Uu
F2 will be
27/64 blue , utterers= XpXg U_
12/64 green, utterers=XgXg U_
9/64 blue, mutterers= XpXg uu
9/64 purple, utterers= XpXp U_
4/64 green, mutterers=XgXg uu
3/64 purple,mutterers= XpXp uu
D. cross between blue mutterer XpXguu and XpXp UU
F1 will be all utterers with 50% blue eyed and 50% purple.