AP Bio: Chromosomal Inhertiance

AP Bio: Chromosomal Inheritance

The force is strong with this one... No like for real it's in his DNA

Multiple Choice

This law describes how each member of a homologous pair is pulled randomly to one side or another in anaphase I

• Law of Segregation

• Law of Independent Assortment

• Law of Gravity

• Law of Mathematical Order

Multiple Choice

This law describes how each homologous pair separates independently of any other pairs during Anaphase I of meiosis

• Law of Segregation

• Law of Independent Assortment

• Law of Gravity

• Law of Mathematical Order

Multiple Choice

If a gene is found only on the X chromosome and not the Y chromosome, it is said to be a:

• Sex-linked trait

• Polygenic trait

• Co-dominant trait

• Incomplete dominance trait

Multiple Choice

Males are more likely to suffer from a sex-linked disease or disorder because:

• Males have more testosterone

• Males have less DNA

• Males have 1 X chromosome, so the disorder is more likely to be expressed

• Females have 1 Y chromosome to mask the trait

Example of X-linked trait cross

The alleles are carried on the X chromosomes ONLY

Open Ended

A man with red-green colorblindness (a recessive, X-linked condition) marries a woman with normal vision whose father was color-blind. What is the probability that they will have a color-blind daughter? That their first son will be color-blind?

Hint: Draw a monohybrid Punnett square with this as the test cross: X^HH^H x X^hY

Open Ended

Why do you think only one X-chromosome can be active?

Multiple Choice

Which genes are most likely linked?

• genes 1 & 2

• genes 2 & 3

• genes 3 & 4

• genes 1 & 4

Multiple Choice

Linked genes tend to be inherited together, like freckles and red hair, because they - - -

• compliment each other well

• are on chromosomes close together

• are on the same chromosome

• tend to be adaptations best suited for the environments of the organism

Multiple Choice

Genetic recombination is the production of offspring - - -

• with new combinations of genes

• with similar genes as their parent

• that are completely different from the parents

• that are super cute and irresistible

Multiple Choice

When does crossing over occur in Meiosis?

• Prophase I

• Anaphase II

• Telophase II

• Metaphase I

Multiple Choice

A linkage map shows - - -

• all the chromosomes lined up from largest to smallest

• a percentage of crossing over events

• a diagram of the dna

• none of these answers are correct

Open Ended

DNA can be silenced by methyl groups called methylation. What you do think happens once genes are silenced?

Open Ended

How does everyone has maternal mitochondrial DNA?

Multiple Choice

What makes this individual's karyotype not normal?

• An extra sex chromosome

• An extra autosome

• A missing sex chromosome

• A missing autosome

Multiple Choice

A chromosome is found to be shorter than it's homologous match.  Which type of mutation would this most likely be?

• insertion
• deletion
• translocation
• inversion

Multiple Choice

An example of a mutation where a piece of chromosome breaks off and attaches to another chromosome is called ___.

• trisomy
• translocation
• inversion
• deletion