Question

examine the completed punnett square.

what is the genotypic ratio?

a 1:1:1:1
b 1:2:1
c 2:2
d 3:1

1. a mutation in american tree frogs turns their color from green to white. which frog affected caused the mutation would provide evidence that the mutation is harmful?

a more attractive to males
b reduced vision
c easily detected by predators
d faster movement on tree bark
e no change in croaks

Explanation:

For the first question (genotypic ratio):

• In a Punnett square with parents \(Dd\times Dd\), the genotypes are \(DD:Dd:dd\).
• Counting the number of each genotype: \(DD = 1\), \(Dd=2\), \(dd = 1\). So the genotypic ratio is \(1:2:1\).

For the second question (harmful mutation):

• A mutation that makes the frogs' color change from green (which likely helps in camouflage) to white would make them easily detected by predators (as they no longer blend in with the green environment).

Answer:

For the first question: B. \(1:2:1\)
For the second question: C. easily detected by predators