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If a heterozygous tall palnt is crossed with a homozygous dwarf palnt, the proportion of dwarf progeny will:-
- a)50%
- b)75%
- c)100%
- d)25%
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
If a heterozygous tall palnt is crossed with a homozygous dwarf palnt,...
A) 50%
Explanation:
A heterozygous tall plant has the genotype Tt (T for the tall allele and t for the dwarf allele). A homozygous dwarf plant has the genotype tt. When these two plants are crossed, the possible genotypes of the progeny can be determined using a Punnett square.
Tt (heterozygous tall plant)
T | t
---------
t | Tt | tt
t | Tt | tt
As we can see, there are 4 possible outcomes: 2 Tt (tall) and 2 tt (dwarf). So, the proportion of dwarf progeny (tt) is 2 out of the 4 possibilities, which is equal to 50%.
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Explanation:
A heterozygous tall plant has the genotype Tt (T for the tall allele and t for the dwarf allele). A homozygous dwarf plant has the genotype tt. When these two plants are crossed, the possible genotypes of the progeny can be determined using a Punnett square.
Tt (heterozygous tall plant)
T | t
---------
t | Tt | tt
t | Tt | tt
As we can see, there are 4 possible outcomes: 2 Tt (tall) and 2 tt (dwarf). So, the proportion of dwarf progeny (tt) is 2 out of the 4 possibilities, which is equal to 50%.
Most Upvoted Answer
If a heterozygous tall palnt is crossed with a homozygous dwarf palnt,...
The answer is 50% (option a).
This is because the tall plant is heterozygous, meaning it has one dominant allele for height (T) and one recessive allele for dwarfism (t). The homozygous dwarf plant, on the other hand, has two recessive alleles for dwarfism (tt).
When these two plants are crossed, their offspring will inherit one allele from each parent. The possible combinations are:
- Tt (tall)
- tt (dwarf)
So, out of the total progeny, half will inherit the recessive allele from the heterozygous parent and will be dwarf (tt), while the other half will inherit the dominant allele and will be tall (Tt).
Therefore, the proportion of dwarf progeny will be 50%.
This is because the tall plant is heterozygous, meaning it has one dominant allele for height (T) and one recessive allele for dwarfism (t). The homozygous dwarf plant, on the other hand, has two recessive alleles for dwarfism (tt).
When these two plants are crossed, their offspring will inherit one allele from each parent. The possible combinations are:
- Tt (tall)
- tt (dwarf)
So, out of the total progeny, half will inherit the recessive allele from the heterozygous parent and will be dwarf (tt), while the other half will inherit the dominant allele and will be tall (Tt).
Therefore, the proportion of dwarf progeny will be 50%.
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If a heterozygous tall palnt is crossed with a homozygous dwarf palnt, the proportion of dwarf progeny will:-a)50%b)75%c)100%d)25%Correct answer is option 'A'. Can you explain this answer?
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