Bio Chapter 7

The law of segregation states that

• alleles of a gene separate from each other during meiosis.

• different alleles of a gene can never be found in the same organism.

• each gene of an organism ends up in a different gamete.

• each gene is found on a different molecule of DNA.

The phenotype of an organism

• is used to represent its genetic composition.

• is the physical appearance of a trait.

• occurs only in dominant individuals.

• cannot be seen.

What would be the blood type of a person who inherited an A allele from one parent and an O allele from the other?

• Type A

• Type B

• Type AB

• Type O

A diagram in which several generations of a family and the occurrence of certain genetic characteristics are shown is called a

• Punnett square.

• monohybrid cross.

• pedigree

• family karyotype.

In humans, eye color and height are controlled by

• simple dominance

• multiple alleles.

• polygenic inheritance.

• incomplete dominance.

Which of the following is not an outcome of the environment modifying a phenotype?

• the changing of the color of an animal’s fur as the temperature changes

• the increased intelligence of a person who attended school for many years

• the very short stature of a kind of tree that grows at a high altitude in comparison with the same kind of tree growing at a lower altitude

• the pink-flowered snapdragons that result from crosses between red-flowered and white-flowered snapdragon plants

Inheritance in which two dominant alleles are expressed at the same time is called co-dominance.

• true

• False

A character for which there are three or more alleles is said to have multiple alleles.

• true

• false

The detectable traits of an organism as determined by what alleles are present is the genotype.

• true

• false

Genes that are close together on a single chromosome are considered to be

• alleles

• homozygous

• independent

• linked