Leaf color and stem length in a certain species of diploid flowers are controlled separately by the R and S locus. The R allele (dominant) results in red leaves while r results in yellow leaves. S (dominant) results in short stems and s results in long stems. A cross is performed between a true breeding long-stemmed red plant and a true breeding short- stemmed yellow plant. a. What is the genotype and phenotype of the resulting F1 plants? b. The resulting F1 plants are crossed with long-stemmed plants with yellow leaves. 100 offspring are collected from this cross, and the following phenotype counts are observed. phenotype long red short red long yellow short yellow count 43 8 40 What are the corresponding genotypes for each of the four classes of the offspring from this cross? c. Using the information above, determine the genotype of the gametes contributed by "parent A" to each of the resulting offspring. Label the gamete types as parental or nonparental.

Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter8: Patterns Of Inheritance
Section: Chapter Questions
Problem 5RQ: Imagine that you are performing a cross involving seed texture in garden pea plants. You cross...
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Leaf color and stem length in a certain species of diploid flowers are controlled
separately by the R and S locus. The R allele (dominant) results in red leaves while r
results in yellow leaves. S (dominant) results in short stems and s results in long stems.
A cross is performed between a true breeding long-stemmed red plant and a true
breeding short- stemmed yellow plant.
a. What is the genotype and phenotype of the resulting F1 plants?
b. The resulting F1 plants are crossed with long-stemmed plants with yellow leaves.
100 offspring are collected from this cross, and the following phenotype counts
are observed.
phenotype
long red
short red
count
43
8
long yellow
short yellow
9
40
What are the corresponding genotypes for each of the four classes of the offspring from
this cross?
c. Using the information above, determine the genotype of the gametes contributed by
"parent A" to each of the resulting offspring. Label the gamete types as parental or
nonparental.
Transcribed Image Text:Leaf color and stem length in a certain species of diploid flowers are controlled separately by the R and S locus. The R allele (dominant) results in red leaves while r results in yellow leaves. S (dominant) results in short stems and s results in long stems. A cross is performed between a true breeding long-stemmed red plant and a true breeding short- stemmed yellow plant. a. What is the genotype and phenotype of the resulting F1 plants? b. The resulting F1 plants are crossed with long-stemmed plants with yellow leaves. 100 offspring are collected from this cross, and the following phenotype counts are observed. phenotype long red short red count 43 8 long yellow short yellow 9 40 What are the corresponding genotypes for each of the four classes of the offspring from this cross? c. Using the information above, determine the genotype of the gametes contributed by "parent A" to each of the resulting offspring. Label the gamete types as parental or nonparental.
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