Chapter 11 Review

speckled

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. What will the feathers of heterozygous chickens of this breed be?

50%

A heterozygous tall pea plant is crossed with a short plant. The probability their offspring will be tall is what percent?

tall

A tall plant (TT) is crossed with a short plant (tt). The offspring will be

because even though a person could be dominant for a trait, they could carry the recessive trait and pass it to their offspring

Explain how a trait might seem to "disappear" for a generation, and then "reappear" in the following generation.

Principle of Dominance

Explains why a plant that is heterozygous (Tt) for plant height is always tall

control crosses between plants

Gregor Mendel removed the male parts from the flowers of some plants in order to do this

all organisms

Gregor Mendel's principles of genetics apply to

green peas if it does not also have a dominant allele for yellow peas

If a pea plant has a recessive allele (y) for green peas, it will produce this

a recessive allele

If a pea plant's alleles for height are tt, both parents contributed this

all will be tall

If you cross Tt x TT, what will the phenotype of the offspring be?

homozygous

Organisms that have two identical alleles for a particular trait are said to be this

Pink

Roan cattle show codominance for the color of their hair. There are alleles for red hair and white hair. What would you expect a heterozygous roan bull to look like if the trait showed incomplete dominance instead?

predict the inheritance of traits of the offspring of genetic crosses

The principles of probability can be used to do this

easy to grow, small, many offspring

What attributes of the garden pea plant made it an excellent organism for Gregor Mendel's genetic studies?

100%

What is the probability that a cross between parents who are both homozygous (rr) recessive for a trait will have offspring that are homozygous recessive for that trait?

one allele from each parent

When Gregor Mendel crossed a "male" plant with a "female" plant, their offspring inherited this

alleles

the different forms or variations of a gene