Question

a certain species of pea plant can either be tall or short. the allele for being tall is dominant to the allele for being short. if a heterozygous tall pea plant is crossed with a homozygous short pea plant, which of the following phenotypic ratios will most likely occur in the first generation? (1 point) 100% tall : 0% short 50% tall 50% short 25% tall 75% short 75% tall : 25% short

Explanation:

Step1: Determine the genotypes

Let \( T \) represent the dominant allele (tall) and \( t \) represent the recessive allele (short). The heterozygous tall pea plant has the genotype \( Tt \), and the homozygous short pea plant has the genotype \( tt \).

Step2: Set up the Punnett square

	\( T \)	\( t \)
\( t \)	\( Tt \)	\( tt \)

Step3: Analyze the genotypes and phenotypes

From the Punnett square, the genotypes are \( Tt \) and \( tt \) in a \( 1:1 \) ratio. Since \( T \) is dominant, \( Tt \) is tall and \( tt \) is short. So the phenotypic ratio is \( 50\% \) tall (\( Tt \)) and \( 50\% \) short (\( tt \)).

Answer:

50% tall : 50% short