The characteristic dark color of a malignant melanoma is the result of the overproduction of what chemical?
1.melanin
2.keratin
3.collagen
4.elastin
1
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The transformation of a normal cell into a cancer cell is ____________________. Fill in the blank(s) with the appropriate word(s)
On chromosomes within an individual, there are ________ alleles for a given gene found on ________ chromosomes.
a. two; homologous b. four; maternal c. four; paternal d. two; Y
Most mollusks have a closed circulatory system in which hemolymph is confined within the walls of hearts and
vessels.
a. True b. False
For some human traits, two possible alleles exist. For other traits, multiple (more than two) alleles for the trait are present in the population. Which of the following is an example of a trait controlled by multiple alleles?
A) albinism B) blood type C) hemophilia D) color blindness