In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

Only round seeds with green cotyledons

Only wrinkled seeds with yellow cotyledons

Only wrinkled seeds with green cotyledons

Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTT genotype is crossed with a plant that is rrtt, then:

25% will be tall with red fruit

50% will be tall with red fruit

75% will be tall with red fruit

All of the offspring will be tall with red fruits

In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates:

Chromosomes failed to separate during meiosis

The two genes are linked and present on the same chromosome

Both of the characters are controlled by more than one gene

The two genes are located on two different chromosomes

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