Predicting Offspring with Punnett Squares

What is the main focus of today's lesson?

• Understanding chromosomes

• Learning about Punnett squares

• Studying cell division

• Exploring ecosystems

Tags

NGSS.HS-LS1-4

NGSS.HS-LS3-1

What is a Punnett square used for?

• Identifying genetic disorders

• Determining the probability of traits in offspring

• Mapping the human genome

• Predicting the exact traits of offspring

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a Punnett square, what does a dominant gene do?

• It is weaker than a recessive gene

• It is always recessive

• It never shows up in the phenotype

• It always wins over a recessive gene

What is the genotype of a cat with long hair if long hair is recessive?

• Big L Big L

• Big L Big L or Big L Little L

• Big L Little L

• Little L Little L

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does 'homozygous recessive' mean?

• One dominant and one recessive gene

• Two dominant genes

• No genes

• Two recessive genes

Tags

NGSS.HS-LS3-2

What is the genotype of an organism with two dominant genes?

• None of the above

• Homozygous dominant

• Heterozygous

• Homozygous recessive

What does 'heterozygous' mean?

• Two dominant genes

• Two recessive genes

• One dominant and one recessive gene

• No genes

Tags

NGSS.HS-LS3-3

In a Punnett square, what is the probability of having a child with attached earlobes if one parent is heterozygous and the other is homozygous recessive?

• 50%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Can two brown-eyed parents have a blue-eyed child?

• Yes, if both are heterozygous

• No, it's impossible

• Yes, if both are homozygous dominant

• Yes, if one is homozygous recessive

Tags

NGSS.HS-LS3-1

What is the probability of having a child with small feet if both parents are heterozygous for foot size?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3