1.
Skin cancers typically develop in the
A) subcutaneous layer.
B) lower layers of the epidermis.
C) lower layers of the dermis.
D) upper layers of the epidermis.
E) upper layers of the dermis.
2.
The genetic makeup of a particular trait in an individual isits
A) genotype.
B) filial.
C) heterozygosity.
D) phenotype.
E) dominance.
3.
Sickle cell anemia is an example of what type ofinheritance?
A) recessive dominance
B) multiple alleles
C) complete dominance
D) incomplete dominance
E) codominance
4.
The segregation principle states that in sexually reproducingdiploid organisms the two copies of each gene
A) will both wind up in either the sperm or egg.
B) segregate from each other during meiosis.
C) move together as a unit during meiosis.
D) separate from each other during mitosis.
E) must always be the same allele.
5.
If you view a cell in which the genetic material is beginning tobe visible as separate bodies, and the nucleus has disappeared fromview, you may surmise that the cells is in
A) metaphase.
B) interphase.
C) anaphase.
D) prophase.
E) telophase.
6.
Tall corn plants (T) are dominant to dwarf plants (tt). Solidgreen leaves (G) are dominant to leaves with a white tip (gg). Across between two corn plants yielded the following phenotypes: 51tall plants with a white tip on their leaves; 43 dwarf plants withsolid leaves; 48 dwarf plants with white tips on their leaves; 45tall plants with solid leaves. What are the genotypes of theparents that produced these plants?
A) TtGg x TtGg
B) TtGg x Ttgg
C) ttGG x TTgg
D) TtGg x ttgg
E) None of the above
7.
What structure holes the sister chromatids to the spindlefibers?
A) cyclin
B) centromere
C) MPF
D) kinetochore
E) chromatin
8.
At the end of metaphase I, _______________ separate.
A) centrioles
B) haploid chromatids
C) homologous chromosomes
D) germ cells
E) sister chromatids
9.
Special cells found in the gonads that give rise to gametes upondivision are called
A) stem cells.
B) basal cells.
C) germ cells.
D) somatic cells.
E) egg cells.
10.
Consider two traits for an organism, determined by two genes,each of which is governed by at least two alleles. In the case of adihybrid individual, the gametes formed will be of either theparental type or the recombinant type. Recombinant type gametes areformed because of
A) multiple alleles.
B) heterozygosity.
C) independent assortment.
D) the principle of dihybrids.
E) incomplete dominance.
11.
Cytokinesis in plant cells differs from cytokinesis in animalcells because
A) plant cells have a rigid cell wall.
B) there is no difference.
C) in plant cells, the cell plate must also divide into twoparts.
D) the contractile protein, actin, is important only in plantcells.
E) a contractile ring forms only in plant cells.
12.
In what phases is the genetic material in the cell correctlyreferred to as chromatids?
A) metaphase and telophase
B) metaphase and prophase
C) interphase and prophase
D) anaphase and metaphase
E) interphase and telophase
13.
If an organism
