In a cross between a homozygous tall plant and a homozygous short plant, what wi

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Question: In a cross between a homozygous tall plant and a homozygous short plant, what will be the height of the F1 generation? (2019)

Options:

Correct Answer: Tall

Exam Year: 2019

Solution:

The height of the F1 generation will be tall, as tall is the dominant trait.

In a cross between a homozygous tall plant and a homozygous short plant, what will be the height of the F1 generation? (2019)

In a cross between a homozygous tall plant and a homozygous short plant, what will be the height of the F1 generation? (2019)

Step 1: Understand the terms 'homozygous tall' and 'homozygous short'. Homozygous tall means the plant has two tall genes (TT), and homozygous short means it has two short genes (tt).
Step 2: Identify the dominant and recessive traits. In this case, tall (T) is the dominant trait, and short (t) is the recessive trait.
Step 3: Cross the two plants. When you cross a homozygous tall plant (TT) with a homozygous short plant (tt), the offspring (F1 generation) will inherit one gene from each parent.
Step 4: Determine the genotype of the F1 generation. The F1 generation will have the genotype Tt, which means they have one tall gene and one short gene.
Step 5: Identify the phenotype of the F1 generation. Since tall (T) is dominant over short (t), the F1 generation will display the tall phenotype.

Dominant and Recessive Traits – Understanding that in genetics, dominant traits mask the expression of recessive traits in offspring.
Homozygous vs. Heterozygous – Recognizing the difference between homozygous (having two identical alleles) and heterozygous (having two different alleles) genotypes.
Punnett Squares – Using Punnett squares to predict the genotypic and phenotypic ratios of offspring from genetic crosses.