Monohybrid Cross Mastery

Imagine Ava, Michael, and Harper are playing a game of 'Guess the Trait'. They are trying to guess what the 'phenotype' of an organism is. Can you help them out?

• Is it the genetic composition of an organism?

• Or, is it the physical appearance of an organism?

• Could it be the location of a gene on a chromosome?

• Or, is it the combination of alleles inherited from parents?

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a monohybrid cross, what is the probability that the offspring will be heterozygous when both parents are heterozygous for a trait?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS4-3

Emma, Aria, and Daniel are having a friendly debate about genetics. They are trying to figure out which of the following represents a homozygous genotype. Can you help them out?

• Aa

• aa

• AA

• Both B) aa and C) AA

Anika, Benjamin, and Michael are having a friendly debate about genetics. They are trying to figure out the purpose of a Punnett square in a monohybrid cross. Can you help them?

• To determine the dominant allele

• To predict the possible genotypes of the offspring

• To confirm the actual genotypes of the parents

• To calculate the exact phenotype of the offspring

Tags

NGSS.HS-LS3-3

If a dominant allele is represented by "A" and a recessive allele by "a", what is the genotype of a plant that is heterozygous for this trait?

• AA

• Aa

• aa

• AAA

Tags

NGSS.HS-LS3-1

What term describes an allele that masks the presence of another allele in an organism's phenotype?

• Recessive

• Dominant

• Homozygous

• Heterozygous

What is the expected genotypic ratio of a monohybrid cross between two heterozygous individuals (Aa x Aa)?

• 1:2:1

• 3:1

• 9:3:3:1

• 2:1

Emma, Luna, and Elijah are having a lively debate about genetics in their biology class. They're discussing a monohybrid cross where the allele for tall (T) is dominant over the allele for short (t). Luna, being the curious one, asks, 'What would be the phenotype of an organism with the genotype "tt"?'

• Tall

• Short

• Medium

• Cannot be determined

What is the probability that an offspring will be recessive for a trait if both parents are heterozygous for that trait?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-3

Zoe, Lily, and Aiden are playing a game of 'Genetic Detective'. They discovered an organism with two identical alleles for a particular trait. What would they call this organism?

• Heterozygous

• Homozygous

• Hemizygous

• Haploid