Suppose that in humans the ability to roll the tongue (r) is dominant to being unable to roll it (r), and having freckles (f) is dominant to having no freckles (f). if a woman heterozygous for both traits married a man with no freckles who couldn't roll his tongue, what is the probability that they would have a freckled, tongue-rolling child?

1/4

Explanation:

A heterozygous woman for both traits (RrFf) marries with a man with no freckles (ff) who can't roll his tongue (rr).

The cross is: RrFf X rrff.

The woman can produce the gametes RF, Rf, rF and rf

The man can only produce rf gametes.

The possible offspring that can arise from the combination of those gametes is:

1/4 RrFf Freckled, tongue-rolling1/4 Rrff Freckled, unable to roll tongue1/4 rrFf Not freckled, tongue-rolling1/4 rrff Not freckled, unable to roll tongue

Aliving thing consumes berries on a yree

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.