Question

The Punnett square shown presents a cross between two piranhas. Both parents have large teeth.

According to the chart, which combination describes the offspring expected from the cross?
A)
50% large-toothed and 50% small-toothed
B)
75% small-toothed and 25% large-toothed
C)
75% large-toothed and 25% small-toothed
D)
100% large-toothed

Answer 1

I believe the correct response is C. 75% large rooters and 25% small toothed.

Answer 2

The correct answer would be C) 75% large-toothed and 25% small-toothed.

It can be explained with the help of the law of dominance which states that the dominant allele expresses itself completely over the recessive allele in the heterozygous condition.

So, the genotype TT, as well as Tt, will result in the production of dominant trait or character in the offspring.

Thus, three (1 TT and 2 Tt) out of four offspring would have large teeth and only one offspring (tt) would have small teeth.

Hence, we can conclude that 75% of the offspring will have large teeth and only 25% will have small teeth.