Question

In pigs, White color (W) is dominant Ang Black (w) is recessive. Using a punnet square ,show And give the genotypic and phenotypic ratio of the following crosses.

1. Twoo heterozygous pigs are mated

Answer 1

The heterozygous black pigs are intercrossed the chance of the first two offspring being black is: a) 75 %.Therefore, a) 75 % is correct.

In guinea pigs, coat color inheritance follows Mendelian genetics.

The information provided indicates that black coat color is a dominant trait, and white is a recessive trait.

When heterozygous (Bb) black pigs are intercrossed, the possible combinations of alleles in their offspring are BB, Bb, and bb.

The Punnett square for this cross would look like:

| B | b |

-----------------

B | BB | Bb |

-----------------

b | Bb | bb |

In this Punnett square, 75% of the offspring have at least one dominant allele (BB or Bb), and therefore, they will have a black coat.

This is because three out of the four possible combinations (BB, Bb, Bb) result in black coat color.

The chance of the first two offspring being black is indeed 75%.

Applying Punnett squares are fundamental in predicting the outcomes of genetic crosses, providing insights into the likelihood of specific traits in offspring based on the parents' genotypes.

Question

In guinea pigs, black coat color is a dominant trait and white is a recessive trait. When heterozygous black pigs are intercrossed the chance of the first two offspring being black is:

a) 75%

b) 56%

c) 44%

d) 6 %