Genetics - Mod

Segments of chromosomes that contain coded information for an organism's traits are called...

• cells

• genes

• alleles

• genotypes

The outward expression, or appearance, of a genetic trait is its...

• allele

• pedigree

• phenotype

• inheritance

The designation Rr for a pea plant's peas shows that the plant is...

• Purple

• A hybrid

• Homozygous

• A true-breeding plant

A model that is used to show possible outcomes of cross-breeding is a...

• ratio

• coin toss

• pedigree

• punnett square

A cow with red hairs and white hairs in its coat is an example of...

• codominance

• multiple alleles

• polygenic inheritance

• incomplete dominance

Variations in people's height and eye color are due to...

• codominance

• multiple alleles

• polygenic inheritance

• incomplete dominance

Which of the following is an example of a biological trait?

• personality

• hair style

• eye color

• regional accent

Mendel began his experiments with purebred plants. This approach enabled him to determine that variations among offspring were the result of...

• random mutation

• self-pollination

• genetic uniformity

• his cross pollination

When Mendel crossed plants that were pure-bred purple with ones that were pure-bred white, he got all purple flowers. When these hybrids were allowed to self pollinate, he got both purple and white flowers. From this he determined that individual traits are...

• inherited as discrete units

• diluted in offspring

• blended with successive generations

• lost in the pollination process

Mendel was able to identify predictable patterns of heredity. He succeeded mainly because he chose to study traits that...

• were always dominant

• tended to be recessive

• could be diluted

• only had two forms/variations