1. Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells?
Mitosis
Meiosis
Fertilization
Reproduction

2. A branch cut off of a geranium plant grows into a new plant
A branch cut off of a geranium plant grows into a new plant. Will the new plant be different from its parent plant?
yes, because mitosis will take place in the new plant
yes, because meiosis will take place in the old plant.
no, because meiosis and fertilization did not take place.
no, because the new plant was formed from gametes.

3. Cats have many different possible coat colors. What does this show?
mutations occurring in sexually reproducing organisms
reproduction in asexually reproducing organisms
division of body cells in adult organisms
variation in sexually reproducing organisms

4. What is true of asexual reproduction? Offspring that
are identical to their parents.
resemble their parents.
are quite different that their parents.
are random and can have different results each time.

5. What is the result of a single cell going through the process of meiosis?
one identical new cell
two identical new cells
three identical haploid bodies
four gamete cells

6. What is an advantage of asexual reproduction?
the offspring are not identical to their parents
the offspring are identical to their parents
there are more offspring produced
there are fewer offspring produced

7. Where are genes for sex-linked traits located?
They can be on any chromosome
On the “Y” chromosome
On the “X” chromosome
On chromosome pair # 21

8. 1 RR: 3 Rr 1 RR: 2 Rr: 1 rr 2 Rw: 2 Ww 3 Rr: 1 rr
A white flower crossed with a red flower produces pink offspring. This is an example of incomplete dominance. If two of the pink-flowered plants are crossed, what ratio will the genotypes of the offspring have?
1 RR: 3 Rr
1 RR: 2 Rr: 1 rr
2 Rw: 2 Ww
3 Rr: 1 rr

9. Why are blood types considered an example of codominance?
there are four types of blood, not two
blood type O can be donated to anyone, AB cannot
blood types A and B will both be expressed when present
there are three alleles for blood type and four types of blood

10. How many pairs of homologous chromosomes do humans have?4 22 46 52

11. If two different alleles are present, which allele is expressed?
Recessive
Dominant
Phenotype
Genotype

12. A tall pea plant (DD) and a tall pea plant (Dd) have what in common?
Phenotype
Genotype
Alleles
Seed color

13. Incompletely dominant
In crossing homozygous dominant and homozygous recessive pea plants, Mendel noted that some genes were not seen in the F1 generation and were seen in only 25% of the F2 generation. What did he call these genes?
Dominant
Recessive
Lethal
Incompletely dominant

14. One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). What is the probability of one of their offspring having long hair?
100%
75%
50%
25%

15. A person with phenotype O blood has how many possible genotypes?6 1 3 2

16. Which pair of chromosomes produces a female offspring?
a female Y chromosome and a male Y chromosome.
a female Y chromosome and a male X chromosome.
a female X chromosome and a male X chromosome.
a female X chromosome and a male Y chromosome.

17. Codominance Incomplete dominance Multiple alleles Complete dominance
Crossing a snap dragon that has red flowers with one that has white flowers produces a snap dragon with pink flowers. The trait for flower color exhibits
Codominance
Incomplete dominance
Multiple alleles
Complete dominance

18. On which of the following chromosomes would a sex-linked trait most likely be found?YO

19. An organism that has two identical alleles for the same trait is called _______ for that particular trait. 
Homozygous
Heterozygous
Dominant
Recessive
codominant

20. In a heterozygous individual the allele being expressed is
recessive.
masked.
redundant.
dominant.

21. Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What would be the appearance of a plant with the genotype PpTt? 
purple flowers, tall
purple flowers, dwarf
white flowers, tall
white flowers, dwarf
pale purple flowers, intermediate height

22. One of the main reasons genes sort independent of one another is that
they produce unrelated traits.
they produce related traits.
they are on the same chromosome.
they are different alleles.
they are on different chromosomes.

23. A single gene has 3 or more alternative forms. These are called
heterozygotes.
multiple alleles.
homozygotes.
multiple zygotes.

24. When Mendel crossed two purple-flowered pea plants with each other, he obtained a phenotypic ratio of 3:1 (purple pea plants to white pea plants). What are the parents?
homozygous dominant purple pea plant and homozygous recessive white pea plant
homozygous dominant purple pea plant and heterozygous white pea plant
heterozygous purple pea plant and homozygous dominant purple pea plant
heterozygous purple pea plant and heterozygous purple pea plant

25. As a genetic counselor, you are constructing a human pedigree for a particular disease. You note that every generation shows the trait, suggesting that it is 
sex-linked.
recessive.
dominant.
cannot determine from the information provided.

26. Gregor Mendel worked with what kind or plant?
Peas
Corn
Wheat
Beans

27. Each alternative form of a gene for a certain trait is called a(n)?
Genotype
Allele
Phenotype
Recessive trait

28. A woman who has type B blood marries a man who has type A blood
A woman who has type B blood marries a man who has type A blood. They have five children, all of which have type AB blood. What are the most probable parental genotypes?
mother IBIB, father IAIA
mother IBi , father IAi
Mother IBIB, father IAi
mother IBi, father IAIA