In your favorite plant, the dominant R allele allows production of red pigment i
ID: 309335 • Letter: I
Question
In your favorite plant, the dominant R allele allows production of red pigment in the flowers, while the recessive r allele produces white flowers. At a second independently segregating gene, the dominant I. allele allows production of large flowers, while the recessive r allele produces small flowers. You cross two plants and get the following offspring: In the table, write the genotype of each progeny class. Use a dash or blank underline if both alleles are possible. What were the genotypes of the two parents? Stan by determining the phenotypic ratio for each trait individually. Use this to deduce the genotypes of the parents for each trait. Then put it all together. Draw a branched line diagram to represent the phenotypes produced in this cross.Explanation / Answer
Red color----------dominant allele-------R
White color----------recessive allele-------r
Large -------------dominant allele-------L
small ----------recessive allele-------l
===========================================
By crossing F1 PLANTS WITH GENEOTYPE PRODUCES FOUR PHENOTYPES
PARENTS
RED LARGE ------ GENOTYPE----------- RRLL
white small ------ genotype----------- rrlll
GENOTYPE----------- RRLL X genotype----------- rrlll
F1 OFFSPRING = RED LARGE ------ GENOTYPE----------- RrLl
F1 OFFSPRING ------ GENOTYPE----------- RrLl x ----------- RrLl F1 OFFSPRING
RL
Rl
rL
rL
RL
Rl
rL
rL
genotypes
Large red
289
LLRR
Small red
104
Rrss
Large white
302
Llrr
Small white
98
llss
RL
Rl
rL
rL
RL
Rl
rL
rL