In spectacled frogs the eye band may be either red or yellow

In spectacled frogs, the eye band may be either red or yellow.   You cross a yellow band male to a red band female and find that 27 offspring (both males and female) have red bands and 31 offspring have yellow bands. What can you conclude?

A. The allele for red is dominant to the allele for yellow

B. The red banded parent was heterozygous

C. One of the parents was heterozygous and one was homozygous recessive

D. You can\'t conclude anything from this experiment

In hamsters, hair texture is controlled by a single gene, and curly coats are dominant to smooth coats. You repeatedly cross two curly haired individuals and obtain a total of 17 smooth haired and 79 curly haired offspring. What do you conclude from this experiment?

A. The chi-square statistic was significant, so the data fit the expected ratio

B. The chi-square statistic was significant, so the data do not fit the expected ratio

C. The chi-square statistic was not significant, so the data fit the expected ratio

D. The chi-square statistic was not significant, so the data do not fit the expected ratio

Solution

Since the red band offsprings and yellow band offsprings have nearly equal ratio, this cross shows exactly the ratio of back cross. So it is possible that one of the parents was heterozygous and one was homozygous recessive The chi square statistic was not significant, so the data do not fit the expected ratio.