A cross between tall plant (TT) and short pea plant (tt) is inherited in progeny that was all tall plants because _______Tallness is the dominant characterShortness is the dominant characterTallness is a recessive traitHeight of pea plant is not governed by gene T or t
Question
A cross between tall plant (TT) and short pea plant (tt) is inherited in progeny that was all tall plants because _______Tallness is the dominant characterShortness is the dominant characterTallness is a recessive traitHeight of pea plant is not governed by gene T or t
Solution
The correct answer is "Tallness is the dominant character".
Here's the step by step explanation:
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In genetics, traits are determined by genes. Each gene has two versions, or alleles, which can be the same (homozygous) or different (heterozygous).
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In this case, the tall plant has two 'T' alleles (TT), making it homozygous for the tall trait. The short pea plant has two 't' alleles (tt), making it homozygous for the short trait.
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When these plants cross, the offspring receive one allele from each parent. This results in a genotype of 'Tt'.
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In a situation where the two alleles are different (heterozygous), the dominant trait is the one that is expressed. In this case, 'T' (tallness) is the dominant trait, and 't' (shortness) is the recessive trait.
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Therefore, even though the offspring have a 't' allele, they will still be tall because the 'T' allele is dominant and masks the expression of the 't' allele.
So, the progeny was all tall plants because "Tallness is the dominant character".
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