Decoding Simple Recessives with Punnett Squares

What is the purpose of using a Punnett square in genetics?

• To measure the lifespan of an animal

• To identify the diet of an animal

• To calculate the probability of genetic traits in offspring

• To determine the physical appearance of an animal

Tags

NGSS.HS-LS3-3

Which of the following is a major recessive trait in leopard geckos?

• Striped

• Murphy patternless

• Bold

• Giant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a Punnett square, what does 'NN' represent for a normal leopard gecko?

• Heterozygous for normal

• Heterozygous for blizzard

• Homozygous recessive for normal

• Homozygous dominant for normal

What is the genetic designation for a blizzard leopard gecko?

• nb

• Bb

• NN

• BB

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

When breeding a visual trait with a het trait, what percentage of the offspring will show the visual trait?

• 50%

• 100%

• 75%

• 25%

Tags

NGSS.HS-LS4-3

What does 'het' stand for in genetics?

• Dominant

• Heterozygous

• Recessive

• Homozygous

When breeding two het traits together, what is the probability of getting a homozygous recessive offspring?

• 25%

• 75%

• 50%

• 100%

Tags

NGSS.HS-LS3-3

What does 66% het mean in the context of breeding two het traits together?

• 66% of the offspring will be homozygous recessive

• 66% of the offspring will be heterozygous

• 66% of the offspring will be normal

• 66% of the offspring will be homozygous dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

How is a 50% het offspring produced?

• By breeding a heterozygous animal with a normal animal

• By breeding two heterozygous animals

• By breeding a homozygous dominant animal with a heterozygous animal

• By breeding two homozygous recessive animals

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is a unique characteristic of the eclipse eye pigmentation trait?

• It can fade out over time

• It is always dominant

• It never shows any pigmentation

• It always shows full pigmentation