Class 10 Science Biology Heredity and Evolution
A tall plant was grown in nutrient deficient soil and remained dwarf. When it is crossed with dwarf plant then
(a)
all hybrid plants are dwarf
(b)
all plants are tall
(c)
all plants depend upon genotype of a tall plant
(d)
obtained plants are 75% tall and 25% dwarf
Correct answer: (d) 
Solution: A tall plant was grown in nutrient-deficient soil and remained dwarf. So, after it is crossed with a dwarf plant, then 75% of plants obtained are tall which include hybrid genotype is Tt and pure genotype TT while 25% dwarf tt.
Hence, the correct option is D. 

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