Genetic Inheritance

What is the term for a change in the DNA sequence?

• Mutation

• Replication

• Transcription

• Translation

Tags

NGSS.HS-LS3-2

differences in inherited characteristics between parent and offspring

• genetic variation

• genotype

• alleles

• phenotype

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

instructions that express our traits

• genes

• recessive allele

• genotype

• alleles

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS1-1

variations of a specific gene

• alleles

• phenotype

• dominant allele

• genetic variation

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

the "stronger" allele

• dominant allele

• recessive allele

• phenotype

• genes

Tags

NGSS.HS-LS4-3

the "weaker" allele

• recessive allele

• dominant allele

• genotype

• phenotype

Tags

NGSS.HS-LS4-4

A man with an autosomal dominant disorder has children with a woman who is healthy. The probability that their first child will inherit the disorder if the disorder allele is represented as "A" and the normal allele as "a" is (a)   .

• 25%

• 50%

• 75%

• 100%

Answer explanation

Answer Explanation highlighting the correct choice of 50%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

In an autosomal recessive inheritance pattern, two parents are carriers of a recessive allele for a genetic disorder. The chance that their child will be affected by the disorder is _____​

• 25%

• 75%

• 10%

• 50%

Answer explanation

In an autosomal recessive inheritance pattern, when both parents are carriers, there is a 25% chance that their child will be affected by the disorder.

If a man with an X-linked recessive disorder has children with a woman who does not carry the disorder, the probability that their daughters will be carriers is (a)   .

• 0%

• 25%

• 50%

• 100%

Answer explanation

Daughters of a man with an X-linked recessive disorder and a woman without the disorder will all be carriers, resulting in a 100% probability of their daughters being carriers.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

In a family where both parents are carriers of an autosomal recessive disease, they have three children. The probability that at least one of their children will be affected by the disease is (a)   .

• 25%

• 50%

• 57.81%

• 75%

Answer explanation

The probability of at least one child being affected by an autosomal recessive disease when both parents are carriers is calculated using the complement rule: 1 - (probability of no children being affected) = 1 - (0.75)^3 = 0.5781 or 57.81%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3