Question

In Russian Daisies, Red flowers are incompletely dominant to white (gene W), and axial flowers are dominant terminal flowers (gene T). Each trait is on a different chromosome. Use the Punnett Square below to determine the possible offspring from a cross between a plant that is heterozygous for both traits and one that is homozygous recessive for both traits. a. Punnett square (not all boxes may be needed)

Answer 1

Using a Punnett square, the possible offspring from a cross between a heterozygous plant and a homozygous recessive plant would be 50% red axial flowers, 25% red terminal flowers, and 25% white axial flowers. No white terminal plants would be produced.

Step-by-step explanation:

To determine the possible offspring from a cross between a plant that is heterozygous for both traits and one that is homozygous recessive for both traits, we can use a Punnett square. In this case, the traits are red flowers (incompletely dominant) and axial flowers (dominant over terminal flowers). Each trait is on a different chromosome. The homozygous recessive plant would have the genotype wwTT, while the heterozygous plant would have the genotype WwTt.

The Punnett square will have two rows for the possible gametes from each parent and two columns for the possible combinations. When we fill in the Punnett square, we find that the possible offspring from this cross would be 50% red axial flowers (WwTt), 25% red terminal flowers (Wwtt), and 25% white axial flowers (wwTt). No white terminal plants would be produced in this cross.

Learn more about Punnett Square