Question

In radishes, red and white are the pure-breeding colors and long and round are the pure-breeding shapes, while the hybrids are purple and oval. The F2 generation of a cross between long and white and red and round will produce....

A) All long and white radishes
B) All red and round radishes
C) A mix of long and white, red and round, purple and oval radishes
D) All purple and oval radishes

Answer 1

The F2 generation from a cross of radishes with different color and shape traits will produce a mix of long and white, red and round, and purple and oval phenotypes, according to Mendelian genetics principles.

Step-by-step explanation:

The question is related to the principles of Mendelian genetics, specifically the concept of independent assortment and dominance in dihybrid crosses. When considering the F2 generation from a cross between radishes with long white shapes and red round shapes, one would expect a mix of phenotypes according to Mendelian ratios. Since the hybrids are purple and oval, and these traits are the result of incomplete dominance, a cross within this context would produce offspring with a mix of traits according to the dihybrid cross.

Using Mendel's principles, we can predict the phenotypic ratio for the F2 generation to be a mix of long and white, red and round, and purple and oval radishes (not present in the original cross). This follows from the fact that there would likely be different combinations of alleles for each trait due to the process of independent assortment. Thus, the correct answer is C) A mix of long and white, red and round, purple and oval radishes.