Monohybrid Cross Practice

What is one of the two forms of a gene called?

• Allele

• Chromosome

• Gene Pool

• Genotype

How many alleles do each person carry for a trait?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS3-1

What does 'homozygous' mean?

• Having two identical alleles for a particular gene.

• Having two different alleles for a particular gene.

• Having one dominant and one recessive allele for a particular gene.

• Having no alleles for a particular gene.

What type of allele always shows up in an organism when it is present?

• Recessive

• Dominant

• Codominant

• Incomplete Dominance

In cacti, if long arms (A) are dominant to short arms (a), what percentage of offspring from two heterozygous cacti will have short arms?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the purpose of a test cross?

• To determine the genotype of an organism with a dominant phenotype.

• To identify the phenotype of a recessive organism.

• To assess the environmental impact on genetic traits.

• To evaluate the effectiveness of a breeding program.

What is a 'trait'?

• A specific characteristic of an organism, such as eye color or height.

• A type of genetic mutation that affects an organism's survival.

• A behavior that organisms exhibit in response to their environment.

• A classification of organisms based on their habitat.

Tags

NGSS.HS-LS3-1

What is the expected genotype ratio from a monohybrid cross?

• 1:2:1 (homozygous dominant : heterozygous : homozygous recessive)

• 3:1 (dominant : recessive)

• 1:1 (homozygous : heterozygous)

• 2:1 (dominant : recessive)

What does 'heterozygous' mean?

• Having two identical alleles for a particular gene.

• Having two different alleles for a particular gene.

• Having no alleles for a particular gene.

• Having one allele for a particular gene.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

What does each box on a Punnett Square represent in terms of an offspring's genotype probability?

• 50%

• 25%

• 75%

• 10%

Tags

NGSS.HS-LS3-3