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In a certain plant species, tall (T) is dominant over short (t). If a homozygous

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Question: In a certain plant species, tall (T) is dominant over short (t). If a homozygous tall plant is crossed with a homozygous short plant, what will be the genotype of the offspring?

Options:

  1. TT
  2. Tt
  3. tt
  4. Tt and tt

Correct Answer: Tt

Solution: 

The homozygous tall plant (TT) crossed with a homozygous short plant (tt) will produce all offspring with the genotype Tt.

In a certain plant species, tall (T) is dominant over short (t). If a homozygous

Practice Questions

Q1
In a certain plant species, tall (T) is dominant over short (t). If a homozygous tall plant is crossed with a homozygous short plant, what will be the genotype of the offspring?
  1. TT
  2. Tt
  3. tt
  4. Tt and tt

Questions & Step-by-Step Solutions

In a certain plant species, tall (T) is dominant over short (t). If a homozygous tall plant is crossed with a homozygous short plant, what will be the genotype of the offspring?
  • Step 1: Identify the genotypes of the parent plants. The homozygous tall plant has the genotype TT, and the homozygous short plant has the genotype tt.
  • Step 2: Understand that 'homozygous' means both alleles are the same. So, TT means both alleles are tall, and tt means both alleles are short.
  • Step 3: When these two plants are crossed, each parent contributes one allele to the offspring.
  • Step 4: The tall plant (TT) can only contribute a T allele, while the short plant (tt) can only contribute a t allele.
  • Step 5: Combine the alleles from both parents. The offspring will receive one T from the tall parent and one t from the short parent, resulting in the genotype Tt.
  • Step 6: Since both parents are homozygous, all offspring will have the same genotype Tt.
  • Mendelian Genetics – Understanding dominant and recessive traits, as well as homozygous and heterozygous genotypes.
  • Punnett Squares – Using Punnett squares to predict the genotypes of offspring from parental crosses.
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