Consider two genes that control the color of a plant flower. A PP or Pp allele c
ID: 19668 • Letter: C
Question
Consider two genes that control the color of a plant flower. A PP or Pp allele combination code for purple while pp is yellow. The allele combinations CC or Cc encode for the ability to produce color, while cc prevents pigmentation so the flowers are white regardless of the combination of the P and/or p alleles.Consider the parental crosses of PPCC x PPCC. What is the expected ratio of flower colors? (Reduce ratios to the smallest common denominator.)
There should be_______purple flowers
to_____yellow flowers
to_____white flowers
What is the relationship between the two genes described?
Explanation / Answer
Consider two genes that control the color of a plant flower.
A PP or Pp allele combination code for purple while pp is yellow.
The allele combinations CC or Cc encode for the ability to produce color, while cc prevents pigmentation
so the flowers are white regardless of the combination of the P and/or p alleles.
Consider the parental crosses of PPCC x PPCC. What is the expected ratio of flower colors? (Reduce ratios to the smallest common denominator.)
parental crosses PPCC x PPCC
PC
PC
PC
PCPC
purple
PCPC
purple
PC
PCPC
purple
PCPC
purple
There should be_ALL OFFSPRINGS ARE P urple flowers
What is the relationship between the two genes described?
P ----allele –DOMINANT ALLELE for purple OVER RECESSIVE ALLEle -p
Allele C –DOMINANT ALLELE for OVER RECESSIVE ALLEle --c
PC
PC
PC
PCPC
purple
PCPC
purple
PC
PCPC
purple
PCPC
purple