In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?

A) 1

B) 1/2

C) 1/4

D) 1/6

E) 0

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Biology

10 February, 01:42

In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?

A) 1

B) 1/2

C) 1/4

D) 1/6

E) 0

+4

Answers (1)

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Edsel · Answer 1

The answer is E) 0.

If:

A - dominant allele,

a - recessive allele,

then:

AA - dominant homozygous (tall),

aa - recessive homozygous (short),

Aa - heterozygous (tall).

A heterozygous plant (Aa) is crossed with a homozygous tall plant (AA):

Parental generation: Aa x AA

F1 generation: AA AA Aa Aa

All of the offspring is tall (AA or Aa), since tall is dominant to short.

There is no chance for offspring to be short (aa).

In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?A) 1B) 1/2C) 1/4D) 1/6E) 0

In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?

A) 1

B) 1/2

C) 1/4

D) 1/6

E) 0