purple flowers are dominant over white flowers. a heterozygous purple flower is crossed with another…
purple flowers are dominant over white flowers. a heterozygous purple flower is crossed with another heterozygous purple flower. what will the ratio of purple to white be? 3:1 1:3 2:2 4:0
Answer
Answer:
A. 3:1
Explanation:
Step1: Definir alelos
Sea ( P ) el alelo dominante (flor morada) y ( p ) el alelo recesivo (flor blanca). Los padres son heterocigotos ( Pp ).
Step2: Tabla de Punnett
| ( P ) | ( p ) | |
|---|---|---|
| ( P ) | ( PP ) (morada) | ( Pp ) (morada) |
| ( p ) | ( Pp ) (morada) | ( pp ) (blanca) |
Step3: Calcular proporciones
Hay 3 descendientes con fenotipo morado (( PP, Pp, Pp )) y 1 descendiente con fenotipo blanco (( pp )). La proporción es ( 3:1 ).