$ 2.3.1 Give the possible gametes of the female guinea pig.
(2)
2.3.2
Two of the offspring of the F1-generation were crossed. The
genotypes of their offspring are represented in the Punnett square
below, except at (i) and (II).
BR
Br
OR
br
>
Br
BBRI
BBIT
BERT
(0)
br
BbRr
Bbm
bbrt
Give the:
(a) Genotype of the offspring at (0)
(b) Phenotype of the offspring at (ii)
(c) Phenotypic ration of all the offspring
(2)
2.3.3
The parents in QUESTION 2.3.2 produced 64 offspring during their
lifetime. How many of them would have had black, rough coats?
Show ALL working.
(2)
2.3.4
The owner of a pet shop would like to breed white guinea pigs with
a smooth coat texture. In order to do this, he wants to breed a
female that has a white, smooth coat with a male that has a black
rough coat.
(2)
State what the genotype of the male should be for him to breed
white guinea pigs with smooth coats.
(10)​