Exploring Monohybrid Crosses with Punnett Squares

The video explores the genetics of hair in guinea pigs, focusing on dominant and recessive alleles. It explains how genotypes and phenotypes are determined, using hairless guinea pigs as an example. The video also covers monohybrid crosses and Punnett squares to predict offspring traits, emphasizing the probabilistic nature of genetic predictions.

What is the primary reason the narrator wanted a hairless guinea pig?

• They are easier to care for

• Because they are rare

• For classroom experiments

• Due to their fascinating genetics

Tags

NGSS.MS-LS4-4

What represents a form of a gene?

• Allele

• DNA

• Protein

• Chromosome

What genotype represents a hairless guinea pig?

• HHh

• hh

• HH

• Hh

Which genotype is considered homozygous?

• HH

• Both hh and HH

• hh

• Hh

What does 'heterozygous' mean?

• Two different alleles

• Two identical alleles

• No alleles

• Only dominant alleles

How can you visually determine a guinea pig's genotype?

• By its color

• You cannot tell by looking

• By its behavior

• By its size

What is the result of crossing two heterozygous guinea pigs?

• Cannot be determined

• All hairless offspring

• All hairy offspring

• A mix of hairy and hairless offspring

Tags

NGSS.MS-LS3-2

What percentage of offspring will be hairless from two heterozygous parents?

• 100%

• 75%

• 50%

• 25%

What does a Punnett square predict?

• Gender of offspring

• Genotype and phenotype ratios

• Lifespan of offspring

• Color of offspring

Why is biology exciting according to the narrator?

• Due to the variety of organisms

• Because of the probabilities

• Due to the complexity of genes

• Because of the predictability

Tags

NGSS.MS-LS4-4