Complex Patterns of Inheritance

Complex Patterns of Inheritance

Objective

To examine inheritance patterns that do not fit Mendelian genetics patterns.

Multiple Choice

Gametes must be haploid because —

• the gametes’ chromosomes will be replicated prior to cell division

• two gametes will unite during fertilization to create a diploid cell

• fertilization results with a haploid zygote

• gametes are small and can hold only the haploid number of chromosomes

Multiple Choice

male sex cell

• egg

• zygote

• sperm

• diploid cell

Multiple Choice

Gametes have haploid or diploid number of chromosomes?

• Haploid

• Diploid

Multiple Choice

Gametes have haploid or diploid number of chromosomes?

• Haploid

• Diploid

Multiple Choice

What type of inheritance do two alleles have if their traits blend together?

• Incomplete Dominance

• Codominance

• Complete dominance

• Sex-Linked

Multiple Choice

Both traits expressed TOGETHER (not blended)

• Codominance

• Incomplete Dominance

• Mendelian trait

• Sex-linked

Multiple Choice

Three or more alternative forms of a gene that can occupy the same locus.

• multiple alleles

• codominant

• polygenic

• incomplete dominance

Multiple Choice

Labrador retriever's fur color is an example of epistasis. In this case the E gene controls the expression of the B gene. It a puppy was born with the genotype eeBB its fur color would be ________ and if it was born with the genotype EEbb it would be __________

• yellow, yellow

• yellow, black

• chocolate, black

• yellow, chocolate

Multiple Choice

Labrador retriever's fur color is an example of epistasis. In this case the E gene controls the expression of the B gene. It a puppy was born with the genotype eeBB its fur color would be ________ and if it was born with the genotype EEbb it would be __________

• yellow, yellow

• yellow, black

• chocolate, black

• yellow, chocolate

Multiple Choice

Coat color in calico cats is an example of:

• Polygenic Traits

• Epistasis

• X-Chromosome Inactivation

• X-linked traits (same as sex-linked)

Multiple Choice

Barr bodies

appear as dark objects in the cell nuclei of female mammals.

• yes

• no

Multiple Choice

Because females have

two X chromosomes and males have only one, body cells

randomly turn off one of the X chromosomes. This is called

...........................................................

• dosage compensation or X-inactivation.

• Incomplete dominance

Multiple Choice

Because females have

two X chromosomes and males have only one, body cells

randomly turn off one of the X chromosomes. This is called

...........................................................

• dosage compensation or X-inactivation.

• Incomplete dominance

Multiple Choice

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

• sex-linked trait
• polygenic trait
• codominant trait
• incomplete dominance trait

Multiple Choice

Why are men 16 times more likely to be color-blind than women?

• to be color-blind, you must have a Y chromosome
• to be color-blind, all of your X chromosomes must have the gene
• color-blindness is caused by testosterone
• color-blindness is caused by the same gene as baldness

Multiple Choice

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

• males are the weaker sex
• males have less DNA
• males have 1 X chromosome, so the disorder is more likely to be expressed

Multiple Choice

The sex of a child is determined by

• whether the father's sperm contains an x or y chromosome
• whether the mother's egg contains an x or y chromosome
• the age of the parents

Multiple Choice

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^r Y ?

• male with red eyes

• female with red eyes

• male with white eyes

• female with white eyes

Multiple Choice

In fruit flies, eye color is a sex linked trait. Red is dominant to white. What is the sex and eye color of flies with the following genotype: X ^R X ^R ?

• male with red eyes

• female with red eyes

• male with white eyes

• female with white eyes

Multiple Choice

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R X ^r ?

• male with white eyes

• female with red eyes

• male with red eyes

• female with white eyes

Multiple Choice

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R X ^r ?

• male with white eyes

• female with red eyes

• male with red eyes

• female with white eyes

Multiple Choice

How many alleles does someone have for a genotype?

• 1
• 2
• 3
• 4

Multiple Choice

What type of inheritance is determined by multiple genes located at different loci on different chromosomes and there can be a range of traits?

• Codominance
• Incomplete dominance
• Polygenic traits

Multiple Choice

Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)

• polygenic inheritance

• multiple alleles

• linked genes

• incomplete dominance