In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y) gives cream coat. A short haired guinea pig is bred to long haired white guinea pig and one of the offspring is a long haired baby guinea pig.

a. What is the probability that an offspring will be recessive for both gene pairs?
b. What is the probability that a short haired white guinea pig will be produced?
(Show solutions)

Cw Cw

Answer of question l have asked above

To determine the probability that an offspring will be recessive for both gene pairs, we need to consider the genotype of the parents.

The short-haired guinea pig can either be homozygous dominant (LL) or heterozygous (Ll) for the hair length gene. However, since the long-haired baby guinea pig was produced, we can conclude that the parent must be heterozygous (Ll) because the dominant allele (L) is not expressed.

The long-haired white guinea pig can only have the genotype (ll yy), as both long hair and white coat are recessive traits.

Now, let's calculate the probabilities.

a. To find the probability of an offspring being recessive for both gene pairs (ll yy), we can use the Punnett square.

| L l
---------|---------
Y | LY Ly
y | lY ly

Combining the genotypes of the parents (Ll yy) and (ll yy) in the Punnett square, we can see that all the offspring will have the genotype (ll yy) for both gene pairs. Therefore, the probability that an offspring will be recessive for both gene pairs is 100% or 1.

b. To find the probability of producing a short-haired white guinea pig, we need to consider the hair length and coat color.

Using the Punnett square:

| L l
---------|---------
Y | LY Ly
y | lY ly

In this case, we are only interested in the genotype (ll yy) since we want a white coat (yy) and the recessive trait for hair length (ll).

From the Punnett square, we can see that there is a 25% chance (1 out of 4) of producing a short-haired white guinea pig (ll yy).

Therefore, the probability of a short-haired white guinea pig being produced is 25% or 0.25.

In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y) gives cream coat. A short haired guinea pig is bred to long haired white guinea pig and one of the offspring is a long haired baby guinea pig.

a. What is the probability that an offspring will be recessive for both gene pairs?
b. What is the probability that a short haired white guinea pig will be produced?
(Show solutions)