How many out of 16 have black hair and long ears? How many out of 16 have black hair and floppy ears? How many out of 16 have brown hair and long ears? How many out of 16 have brown hair and floppy ears?
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Genetic Crosses that Involve 2 Traits
In rabbits, black hair is dominant to brown hair. Also in rabbits, long
straight ears are dominant to floppy ears.
These letters represent the genotypes and phenotypes of the
rabbits:
BB = black hair
EE = long ears
Ee = long ears
ee = floppy ears
Bb = black hair
bb = brown
1. A male rabbit with the genotype BBee is crossed with a female rabbit
with the genotype bbEe The square is set up below. Fill it out and
determine the phenotypes and proportions in the offspring.
How many out of 16 have black hair
Be
Be
Be
Be
and long ears?
bE
How many out of 16 have black hair
and floppy ears?
be
How many out of 16 have brown hair
and long ears?
bE
How many out of 16 have brown hair
be
and floppy ears?
2. Show the cross: GgBb x ggBb
How many out of 16 have black hair
and long ears?
How many out of 16 have black hair
and floppy ears?
How many out of 16 have brown hair
and long ears?
How many out of 16 have brown hair
and floppy ears?"
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Since in this question, the 2nd cross does not specify the phenotypic characters that is represented by the letter G and g, I will solve the first question for you. Is the solution for the other cross is also intended, please post the question with specification on the phenotypic character G and g.
In the given data, black is the dominant colour and long ear is the dominant shape.
It is seen that in the homozygous condition, the black colour is phenotypically expressed. Also in the heterozygous condition, black colour is phenotypically expressed.
It is also seen that in Homozygous listen, long ear is phenotypically expressed. Also in the heterozygous condition, long ear is phenotypically expressed.
The first question shows the cross between BBee, bbEe. The parents are having black hair and floppy ears and brown hair and long ears respectively.
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