HEREDITY
BACKCROSS OR TESTCROSS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which scenario best supports the conclusion that a black guinea pig’s genotype is homozygous dominant?
|
|
after mating with a white guinea pig, 2 black & 2 white guinea pigs were produced
|
|
|
after mating with a white guinea pig, 10 black & 8 white guinea pigs were produced
|
|
|
after mating with a white guinea pig, 12 black guinea pigs were produced
|
|
|
after mating with a black guinea pig, 4 black guinea pigs were produced
|
Explanation:
Detailed explanation-1: -In Guinea pigs, the genotype (BB) is black, and the genotype (bb) is white color, and (Bb) is grey color, The gene (B) and (b) are sex-linked.
Detailed explanation-2: -In guinea pigs, black coat color is a dominant trait and white is a recessive trait.
Detailed explanation-3: -The black hair of guinea pigs is produced by a dominant gene B and white by its recessive allele b. Unless there is evidence to the contrary, assume that II1 and II4 do not carry the recessive allele.
Detailed explanation-4: -In guinea pig, black short hair (BBSS) is dominant over white long hair (bbss).
There is 1 question to complete.