Biology Complex Patterns of Inheritance Notes

Biology Complex Patterns of Inheritance

Multiple Choice

A white flowered plant is crossed with a red flowered plant resulting in F1 offspring that are pink. This is an example of:

• codominance

• incomplete dominance

• complete dominance

Multiple Choice

A white cow is crossed with a red bull, the resulting F1 offspring is roan (spotted white and red). This is an example of:

• incomplete dominance

• codominance

• complete dominance

Multiple Choice

Some forms of inheritance are determined by more than two alleles, an example being human blood types which have alleles for types A, B, and O. This is referred to as:

• codominance

• multiple alleles

• incomplete dominance

• epistasis

Multiple Choice

Term for an interaction where of one allele hides the effects of another allele. It can be seen in the coat color of Labrador retrievers, which can be black, brown, or yellow. Dogs appear yellow because the black/brown dark fur gene is "blocked" by the homozygous recessive yellow fur gene.

• codominance

• dominance

• multiple alleles

• epistasis

Multiple Choice

What determines whether or not an individual is male or female?

• sex chromosomes

• autosomes

Multiple Choice

An individual with the sex chromosomes XY would be:

• male

• female

Multiple Choice

The X chromosome carries a variety of genes that are necessary for the development of both females and males. The Y chromosome mainly has genes that relate to the development of male characteristics. In females, one X chromosome is inactivated in each cell, becoming a barr body. This is called:

• Y inactivation

• X inactivation or dosage compensation

• epistasis

Multiple Choice

Traits controlled by genes located on the ___ chromosome are sex-linked traits. Because males only have one of this type of chromosome, they are more affected by harmful recessive genes on this particular chromosome.

• X

• Y

Multiple Choice

These type of traits arise from the interaction of multiple pairs of genes. Examples include such traits as skin color, height, and eye color

• epistasis

• polygenic traits

• autosomes

Multiple Choice

In addition to genetic factors, environmental factors can also affect an organism's phenotype.

• True

• False