Principles of I...

In humans, freckles is dominant over no freckles. A man with freckles marries a woman having freckles but the children have no freckles. What chances did each child have for freckles.

In the following pedigree chart, the mutant trait is shaded black. The gene responsible for the trait is

Wife is PTC non-taster and husband is PTC taster. Their son is taster but daughters are non-tasters. This is not a sex linked trait. Which pedigree is correct?

In all the Mendels experiments, the two alleles causing a trait were

Which is correct?

All of the following are sexual sources of genetic variation except

Choose the correct answer from the alternatives given.
One pure strain of pea plants developed by Mendel had yellow seeds and another strain had green seeds. All the offsprings from crosses between these two parental strains of plants had yellow seeds. In these plants, the allele for yellow seed colour is 

$$F_1$$ offspring of the monohybrid cross AA $$\times$$ aa are _______.

Genetic variability can be created by