Biology Genetics Exam

In Mendel’s experiments, the trait that disappeared in the first generation and reappeared in the next generation is called the

• homozygous trait

• heterozygous trait

• recessive trait

• dominant trait

Tags

NGSS.HS-LS3-1

In the punnett square, what percent of offspring will show the dominant trait?

• 25%

• 50%

• 75%

• 100%

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NGSS.HS-LS3-3

A person who has both the dominant and recessive alleles for a trait is

• Homozygous

• Polyzygous

• Recessive

• Heterozygous

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

A person who has both a dominant allele and a recessive allele would display which phenotype

• The recessive phenotype

• 50% chance of displaying either

• The dominant phenotype

• A mix of the two alleles

Tags

NGSS.HS-LS3-1

A genotype represents

• The two alleles an organism inherits from its parents

• The physical appearance of a trait

• The full molecule of DNA an offspring will have

• How many chromosomes an organism has

Tags

NGSS.HS-LS3-1

In a Punnett Square with a heterozygous father and a heterozygous mother, what percent of offspring will display the dominant phenotype?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In a Punnett Square with a homozygous dominant father and a homozygous recessive mother, what percent of offspring will show the recessive phenotype?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which of the following describes a phenotype?

• having freckles
• Gg
• heterozygous
• homozygous

Tags

NGSS.HS-LS3-3

Crossing a purebred purple-flowered plant with a purebred white-flowered plant is best symbolized by which of the following genotypic crosses?

• PP x PP

• Pp x Pp

• Pp x pp

• PP x pp

Tags

NGSS.HS-LS3-1

Which of the following represents an example of a homozygous recessive genotype?

• AaAa
• Aa
• AA
• aa

Tags

NGSS.HS-LS3-1