Question

homework - complete dominance inheritance pattern
a cross between two flowers was performed in which both flowers were red. in this plant species, red flower color (r) is dominant over white flower (r)
from this cross, one thousand flowers were produced, and the colors of the offspring flowers were recorded.

assuming that both of the parent plants were heterozygous, what answer correctly reflects the number of offspring flowers (out of 1,000) of each color that
would be predicted from this cross?

Explanation:

Step1: Determine the cross

Parents are heterozygous \( Rr\times Rr \).

Step2: Use Punnett square

Gametes	R	r
r	Rr	rr

Genotypic ratio \( RR:Rr:rr = 1:2:1 \). Phenotypic ratio (red:white) \(= 3:1\).

Step3: Calculate the number of each phenotype

Total offspring \( n = 1000 \). Number of red - flowered \(=\frac{3}{4}\times1000 = 750\). Number of white - flowered \(=\frac{1}{4}\times1000=250\).

Answer:

Y.