In a cross of heterozygous RW four o'clock plants (RW x RW) what proportion of the seeds will grow to produce pink flowers?
A. 0
B. 0.25
C. 0.5
D. 0.75
is this B?
In cross between a pea plant that has smooth yellow seeds (SsYy)with a second plant of the same genotype, what proportion of the seeds will grow up to produce smooth green seeds?
To determine the proportion of seeds that will grow to produce pink flowers in a cross of heterozygous RW four o'clock plants (RW x RW), we need to understand the principles of Mendelian genetics and the inheritance pattern of flower color.
In this case, the dominant allele for flower color is represented by the letter R, which produces red flowers, while the recessive allele is represented by the letter W, which produces white flowers. The heterozygous plants have one copy of each allele (RW), making them heterozygous for flower color.
According to Mendel's laws of segregation and independent assortment, when two heterozygous plants are crossed, there are four possible combinations of alleles in the offspring: RR, RW, RW, and WW.
In this question, we are interested in the proportion of seeds that will produce pink flowers. Pink flowers occur when both the dominant (R) and recessive (W) alleles are present. From the four possible combinations, only two (RW, RW) have the potential to produce pink flowers.
Therefore, out of the total four possible outcomes, two of them (RW, RW) result in pink flowers.
To get the proportion, we divide the number of outcomes resulting in pink flowers (2) by the total possible outcomes (4):
Proportion = Number of outcomes resulting in pink flowers / Total possible outcomes
= 2 / 4
= 0.5
Therefore, the proportion of seeds that will grow to produce pink flowers is 0.5 or C.