Question

in radishes, red (rr) and white (ww) are pure - breeding colors, while hybrids are purple (rw). if a red radish is crossed with the offspring? (aks 7e1)
a offspring will be 100% red.
b offspring will be 50% red and 50% white.
c offspring will be 50% red and 50% purple.
d offspring will be 100% white.
e offspring will be 100% purple.

Explanation:

The problem is about the genetics of radish color inheritance. Red (RR) and white (WW) are pure - breeding, and hybrids (RW) are purple. We assume the red radish (RR) is crossed with a white radish (WW) (since the problem is about offspring of a red radish cross, and the hybrid is RW).

Step 1: Determine the genotypes of parents

The red radish has a genotype of RR, and we assume the other parent (for a cross to get offspring) is a white radish with genotype WW.

Step 2: Use the Punnett square principle

When we cross RR and WW, each parent will contribute one allele. The RR parent can only contribute an R allele, and the WW parent can only contribute a W allele. So all of the offspring will have the genotype RW.

Step 3: Determine the phenotype of offspring

Since hybrids (RW) are purple, all (100%) of the offspring will be purple. Looking at the options, option E says "Offspring will be 100% purple", which matches our result.

Answer:

E. Offspring will be 100% purple.