Question

A homozygous 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 hybrid plants are tall
• C. $50\%$ tall and $50\%$ dwarf
• D. $75\%$ tall and $25\%$ dwarf

Answer 1

The correct option is B All hybrid plants are tall

If a plant is homozygous tall, it contains both the dominant genes TT. Thus, if it grows in a nutrient deficient soil and remains dwarf, that does not change its genetic constitution.

Thus, when it is crossed with a dwarf plant (tt), in the next generation all plants will be hybrids (Tt), which will be tall.

Thus, option B is correct.