Question

12 multiple choice 1 point
in pea plants, tall (t) is dominant over short (t). using the cross (tt × tt), what is the genotypic ratio?
3tt:1tt
1tt:2tt:1tt
2tt:2tt
1tt:3tt

Explanation:

Step1: Determine gametes

Parents with genotype \(Tt\) produce gametes \(T\) and \(t\).

Step2: Create Punnett square

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

Step3: Count genotypes

From the Punnett square, there is \(1\) \(TT\), \(2\) \(Tt\), and \(1\) \(tt\). So the genotypic ratio is \(1TT:2Tt:1tt\).

Answer:

B. \(1TT:2Tt:1tt\)