1) Black fur in mice (B) is dominant to brown fur (b). short tails (H) are domin
ID: 7759 • Letter: 1
Question
1) Black fur in mice (B) is dominant to brown fur (b). short tails (H) are dominant to long tails (h). what fraction of the offspring of the cross BbHh x BBhh will have black fur and long tails?a) show gametes of parent BbHh.
b) show gametes of parent BBhh.
c) show punnett square for the cross.
2) A couple has three children, all of whom have brown eyes and blond hair. Both parents are homozygous for brown eyes (BB), but one is a blond (rr) and the other is a redhead (Rr). what is the probability that their next child will be a brown-eyed redhead?
a) parental generation:
b) show the punnet square:
3) cross a homozygous dominant snapdragon with a homozygous recessive snapdragon. give the following details:
a) parental generation:
b) F1 genotype:
c) F1 phenotype:
d) show punnett squre for F2:
Explanation / Answer
1. 1/2 of the mice will have black fur and long tails. 50% is also acceptable.
a) Parent BbHh has gametes BH, Bh, bH, and bh.
b) Parent BBhh has gametes Bh, Bh, Bh, Bh.
c)
Bbhh
2. 50% probability, or 1/2.
a) Not really sure what this is asking? The gametes for the parental generation are shown in each column in the Punnett square or you could just need to say BBRr and BBrr.
b)
3.Homozygous dominant (MM), homozygous recessive (mm)
a) MM, mm
b) F1 genotype: all will be Mm
c) Phenotype will be that of the dominant trait.
d)
BH Bh bH bh Bh BBHh BBhh BbHh Bbhh Bh BBHh BBhh BbHh Bbhh Bh BBHh BBhh BbHh Bbhh Bh BBHh BBhh BbHh
Bbhh
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.