Gametes are produced by the process of

meiosis.

A breed of chicken shows incomplete dominance for feather color. One allele codes for black feathers, another codes for white

feathers. The feathers of heterozygous chickens of this breed

will be

Gray.

In rabbits, there are four different versions of the gene for coat color. What pattern of

inheritance is this?

multiple alleles.

When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited ___

allele from each parent.

one

If an organism’s diploid number is 46, its haploid

number is

23

What are the only kinds of cells that undergo meiosis?

sex cells, gametes

This diagram shows

incomplete dominance

When you flip a coin, what is the probability that it will

come up tails?

50%

What is the probability that a cross between parents who are both homozygous recessive for

trait will have offspring that are homozygous recessive for

that trait?100%

Variation in human skin color is an example of

polygenic traits.

Organisms that have two different alleles for a particular

trait are said to be

heterozygous.

Which of the following supports the claim that the environment can affect genetic traits?a. Pinion trees bear cones every other year.b. Dandelion plants are self pollinating. c. Oak trees get taller as they grow.d. Hydrangea flower color varies with soil pH.

Hydrangea flower color varies with soil pH.

Unlike mitosis, _________results in the

formation of haploid cells.

meiosis

A breed of chicken shows codominance for feather color. One

allele codes for black feathers, another codes for white feathers.

The feathers of heterozygous chickens of this breed will be

speckled.

Chromosomes form tetrads during __________ of meiosis.

prophase I

If two genes are on the same chromosome and rarely assort independently, the genes are

probably located _____close to each other.

Or far apart from each other

close to each other.

The different forms of a gene are called

alleles.

What principle states that during gamete formation genes

for different traits separate without influencing each

other’s inheritance?

principle of independent assortment

A male and female bison that are both heterozygous for normal

skin pigmentation (Aa) produce an albino offspring (aa). Which

of Mendel’s principles explain(s) why the offspring is albino?

dominance and segregation

A tall plant (TT) is crossed with a short plant (tt). If the tall

F1 pea plants are allowed to self-pollinate, the offspring can

be

tall or short.

True or FalseThe farther apart two genes are located on a chromosome, the

less likely they are to be inherited together.

True

True or FalseOne way that meiosis I is

different from mitosis is that meiosis I produces 2 haploid daughter cells, but mitosis

produces 2 diploid daughter cells.

True

A _________ consists of a homologous pair of

chromosomes, each made of two chromatids.

tetrad

four genetically different cells are is formed at the end of

__________

meiosis

A heterozygous tall pea plant is crossed with a short plant. The

probability that an F1 plant will be tall is

50%.

True or FalseGregor Mendel’s principles of

genetics apply to pea plants only.

(False) all organisms

The number of chromosomes in a gamete is represented by

the symbol

N

Situations in which one allele for a gene is not completely dominant over another allele

for that gene are called

incomplete dominance.

Mitosis results in two cells, whereas meiosis results in

_____ cell.

four

Organisms that have two identical alleles for a particular

trait are said to be

homozygous.

The probability that a gamete produced by a pea plant

heterozygous for stem height (Tt) will contain the recessive

allele is _____%

50%

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?

It would be pink.

An organism has 24 chromosomes in a body cell. After mitosis each cell has 24 chromosomes. After

meiosis each gamete has ____________________

chromosomes.

12

What is being shownCrossing-over