A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is (1 point)

25%.

50%.

75%.

100%.

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Hussain514 Hussain514 · Answer 1 · 2016-08-06T05:31:57-04:00

50 percent will b tall and 50 percent will b short
T t
t Tt tt
t Tt tt make punnet square hope this will b helpful

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JoiePatel JoiePatel · Answer 2 · 2018-11-19T06:01:10-05:00

Answer:

The correct answer would be 50%.

In heterozygous condition, the phenotype of the plant was tall. Hence, we can conclude that tall is coded by the dominant allele.

Let us assume "T" (dominant) and "t" (recessive) be the alleles of the gene regulating the height of the plant.

So, Tt and TT will code for tallness and tt will code for shortness of the plant.

Now, the genotype of the parent plants: Tt (heterozygous tall) and tt (homozygous short).

Gametes formed by Tt parent: T and t.

Gametes formed by tt plant: t.

The cross in the form of Punnett square is shown in the figure attached.

It showed that 50% of the offspring were heterozygous (Tt) tall while other 50% were homozygous (tt) short.