Understanding Punnett Squares

This video tutorial from MooMoo Math and Science covers the basics of Punnett squares, including key genetic terms such as genotype, phenotype, heterozygous, and homozygous. It provides practical examples using characters like SpongeBob and Patrick to illustrate how to create and interpret Punnett squares, focusing on dominant and recessive traits. The video aims to help viewers understand genetic inheritance patterns and probabilities.

What is the term for the genetic makeup of an organism?

• Homozygous

• Phenotype

• Genotype

• Heterozygous

Which of the following represents a heterozygous genotype?

• BB

• bb

• Bb

• bB

What is the phenotype of an organism with a homozygous recessive genotype?

• Dominant trait

• Unknown trait

• Recessive trait

• Mixed trait

In a Punnett square, what does a capital letter represent?

• Heterozygous allele

• Recessive allele

• Dominant allele

• Homozygous allele

If SpongeBob is heterozygous for a trait, what is his genotype?

• ss

• sS

• SS

• Ss

What is the probability of SpongeBob and Sponge Susie's offspring having a square shape?

• 75%

• 100%

• 25%

• 50%

If both parents are heterozygous for a trait, what is the probability of their offspring being homozygous recessive?

• 75%

• 50%

• 25%

• 0%

What is the dominant trait in Patrick and Patty's offspring?

• Blue

• Pink

• Green

• Yellow

How many out of four offspring will be pink if both parents are heterozygous for pink?

• 3

• 2

• 4

• 1

What is the only way to express a recessive trait in offspring?

• One recessive allele

• Two dominant alleles

• Two recessive alleles

• One dominant allele