In a certain plant, red flower color(R) is dominant over white(R). if a plant heterozygous for red flower color and one with white flower are crossed, which of the following would be the expected proportion of individual in the next generation?
A. 4/4 red 0/4 white
B. 3/4 red 1/4 white
C. 1/2 red 1/2 white
D. 1/4 red 3/4 white
I think B
Wrong. Do a Punnett Square.
https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
The answer is C 1/2 red, 1/2 white
r r
R Rr Rr
r rr rr
The answer is C 1/2 red, 1/2 white
. r r
R . Rr Rr
r . rr rr
To determine the expected proportion of individuals in the next generation, we need to understand the principles of Mendelian genetics.
In this scenario, red flower color (R) is dominant over white flower color (r). The plant being crossed is heterozygous for red flower color (Rr), while the other plant has white flower color (rr).
When we cross these two plants, we can use a Punnett square to determine the possible outcomes of the offspring.
The Punnett square for this cross would look like this:
R r
---------------
R | RR Rr
r | Rr rr
From the Punnett square, we can see that there are two possible genotypes for the offspring: RR and Rr. Both of these genotypes would result in red flower color, since red (R) is dominant over white (r).
Therefore, the expected proportion of individuals with red flower color is 3/4 (RR + Rr), and the expected proportion of individuals with white flower color is 1/4 (rr).
Hence, the answer is B.