Mastering Punnett Squares and Genetic Variation

What are alleles in the context of pea plant genetics?

• Types of plant diseases

• Types of dominant genes

• Different versions of a gene

• Different types of pea plants

Tags

NGSS.HS-LS3-2

Which allele is dominant for round seeds in pea plants?

• Uppercase R

• Lowercase r

• Both uppercase R and lowercase r

• Neither

What does it mean if a pea plant is heterozygous for a trait?

• It has two identical alleles

• It has two different alleles

• It lacks alleles

• It has mutated alleles

What is the purpose of a Punnett square in genetics?

• To measure plant growth rate

• To analyze the soil quality

• To predict the possible genetic outcomes of a cross

• To determine the physical characteristics of plants

Tags

NGSS.HS-LS3-3

What is the expected ratio of round seeds to wrinkled seeds in the offspring of two heterozygous pea plants?

• 2:1

• 3:1

• 4:0

• 1:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which genotype represents a pea plant with wrinkled seeds?

• RR

• Rr

• rr

• RrR

What is the genotype of a homozygous plant for wrinkled seeds?

• Rr

• rr

• RrR

• RR

In a cross between a homozygous wrinkled seed plant and a heterozygous plant, what is the expected phenotypic ratio of round to wrinkled seeds?

• 0:4

• 2:2

• 3:1

• 1:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which scenario will result in offspring with at least one round seed allele?

• None of the above

• Crossing two rr plants

• Crossing two RR plants

• Crossing an RR plant with an rr plant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does a Punnett square help predict?

• Best soil types for plants

• Genetic variations in offspring

• Plant age

• Weather conditions for plant growth

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2