Ch. 8 Test review

Who can be carriers for sex linked traits?

A chart that tracks which members of a family have a particular trait.

A chart that shows all the possible ways alleles can combine in a genetic cross is called:

Human cells have _____ pairs of chromosomes.

What % of the offspring from this cross would be short if T = dominant?

No two people have exactly the same DNA fingerprint.

Hemophilia is recessive. What is the chance of this couple having a child that has hemophilia?

Probability is:

If the first row are the parents, how many children did they have?

A sex cell in an onion has 8 chromosomes. How many chromosomes will an onion skin cell have?

If B = brown & b = blonde, what are the correct phenotypes from this cross?

The passing of physical characteristics from parent to offspring is called:

If brown eyes = dominant & blue = recessive, how can 2 brown eye parents have a blue eye child?

An organism's traits are controlled by the _____ it inherits from it's parents.

Each row is a generation, top = #1, bottom = #4 Which is true for the 3rd generation?

This process results in organisms that have an exact copy of their parents DNA.

Most traits are the result of simple patterns of inheritance.

What % of the offspring from this cross would have a homozygous genotype?

Mendel found that the "lost" form of a trait reappeared in ____ of the 2nd generation plants.

When a black hen and a white rooster cross to produce an offspring with black & white feathers.

When 4 alleles control fur color in rabbits, so their color ranges from brown to grey to white.

A person who has one recessive allele for a trait and one dominant allele.

A cell from a turkey's wing has 40 chromosomes. How many chromosomes are in a turkey sex cell?

The chromosome theory of inheritance states: _____ pass from parent to offspring on chromosomes

What does the notation Tt mean to geneticists?

An organism that is the offspring of many generations that have the same form of a trait.

The factors that control a trait are called:

If T = Tall, what are the correct phenotypes of the offspring from this cross?

Because hemophilia is a sex linked disorder, it occurs more frequently in females.

A woman has 2 sons. What is the probability that her third child will be a girl?

An organism's genetic makeup or alleles.

An organism that has exactly the same genes as the organism from which it was produced.

A recessive allele is hidden whenever a dominant allele is present.

Environmental factors can influence the way genes are expressed.

The study of principles about what is right/wrong, fair/unfair is called:

If both parents are heterozygous for a trait, what % of their offspring would be heterozygous?

Hemophilia = h What are the chances of this pair having a girl with hemophilia?

An organism's physical appearance or visible traits.

When a cross between a red flower plant and a white flower plant creates a pink flower plant.

Which alleles for blood type are dominant?

What % of the offspring from this cross are heterozygous?

An allele whose trait always shows up in an organism when the allele is present.

The sex chromosomes only carry genes that determine a person's gender.

Are identical twins clones?

The father always determines the sex of the offspring because:

An organism that has 2 different alleles for a trait.

An organism that has 2 identical alleles for a trait.

An organism that has two different alleles for a trait.

A family has 4 children. One boy and one girl are colorblind. Is the father colorblind?

If the top line/generation 1 is the grandparents, how many grandchildren do they have?

When more than 1 gene affects a trait, leading to a wide range of phenotypes. ex: human height

The scientific study of heredity is called:

Each specific characteristic, such as stem height or seed color is called:

During this process, sex cells with half the normal number of chromosomes are created