Unit 5 Concept 1 - Mendelian Genetics

The version of a gene that is expressed if present is the________allele.

• recessive
• dominant
• homologous
• heterozygous

The version of a gene that is expressed if the dominant allele is NOT present is the________allele.

• recessive
• dominant
• homologous
• heterozygous

Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

• 100% purple.
• 75% purple, 25% white.
• 50% purple, 50% white.
• 25% purple, 75% white.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

• 100% purple.
• 75% purple, 25% white.
• 50% purple, 50% white.
• 25% purple, 75% white.

If an organism inherits one dominant allele and one recessive allele for eye color, their genotype would be:

• haploid
• homozygous
• heterozygous
• homologous

Two parents have the genotype Gg for a genetic disorder caused by a recessive allele. What is the chance that any oftheir children will inherit the disorder?

• 25%
• 75%
• 100%
• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which Mendelian law of inheritance states that organisms inherit two copies of each gene and donate one copy to each of their offspring?

• Law of Dominance
• Law of Segregation
• Law of Independent Assortment
• Chromosome Theory of Inheritance

Tags

NGSS.HS-LS3-2

Imagine two heterozygous parents. Each has a dominant allele (B) for brown eyes and a recessive allele (b) for blue eyes. What would the genotypic ratio of the offspring be?

• 100% Bb
• 50% BB, 50% Bb
• 25% BB, 50% Bb, 25% bb
• 50% Bb, 50% bb

Tags

NGSS.HS-LS3-1

TT

• Heterozygous
• Homozygous

Tags

NGSS.HS-LS3-1

Tt

• Homozgyous
• heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2