Which represents the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is homozygous and has green-colored pods?
$Y_y{ }^{\prime} y y$
$Y^{\prime} y y$
$Y_y{ }^{\prime} Y_y$
$y y^{\prime} y y$
Answer (1)
Represent the heterozygous yellow pod plant as Y y and the homozygous green pod plant as yy .
Represent the cross between the two plants using the ' × ' symbol.
Combine these to represent the cross as Y y × yy .
The correct representation of the cross is Y y × yy .
Explanation
Understanding the Problem The problem asks us to represent the cross between a heterozygous yellow pod plant ( Y y ) and a homozygous green pod plant ( yy ). The cross is represented using the ' × ' symbol.
Representing the Cross The genotype of the first parent is Y y , and the genotype of the second parent is yy . Therefore, the cross between them is represented as Y y × yy .
Final Answer Comparing this with the given options, we see that the correct representation is Y y × yy .
Examples
In genetics, understanding how to represent crosses between different genotypes is crucial for predicting the possible genotypes and phenotypes of offspring. For example, if you're breeding pea plants and want to know the likelihood of getting plants with green pods from a cross between a heterozygous yellow pod plant and a homozygous green pod plant, you need to correctly represent the cross ( Y y × yy ) to perform a Punnett square analysis and determine the probabilities of different offspring genotypes.
