Tuesday, February 7, 2012

Tallness (T) is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). The heteroz?

Tallness (T) is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). The heterozygous condition results in pink (Rr) flower color. A dwarf, red snapdragon is crossed with a plant homozygous for tallness and white flowers. What are the genotype and phenotype of the F1 individuals?





a. ttRr-dwarf and pink



b. ttrr--dwarf and white



c. TtRr--tall and red



d. TtRr--tall and pink



e. TTRR--tall and red

Tallness (T) is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). The heteroz?
The answer is D.



Crossing -- dwarf red flower x homozygous tall white flower

Genotype -- (ttRR) x (TTrr)

Genotype segregation -- (t) (t) (R) (R) x (T) (T) (r) (r)

F1 generation -- All (TtRr)

Phenotype -- Tall %26amp; Pink
Reply:d


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