An autoimmune disease occurs when:
A. immune cells react too strongly with
antigens normally present on host cells.
B. there is an unregulated release of cytokine
by helper T cells.
C. cytotoxic T cells attack B cells.
D. macrophages engulf normal host cells.
A
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Which one of the following fungal groups has an alternation of multicellular gametophyte and sporophyte generations?
A. Zygomycetes B. Ascomycetes C. Blastocladiomycota D. Chytridiomycetes E. Glomeromycetes
What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that will express the dominant trait
for one of the two alleles? a. 16/16 b. 9/16 c. 6/16 d. 3/16 e. 1/16
What does the phenotype of an individual refer to?
a. copies of chromosomes b. physical appearance c. number of alleles d. genetic makeup
When does an oocyte complete meiosis II?
A) after fertilization B) immediately after birth C) immediately after release from the ovary D) as soon as puberty begins E) in the seventh month of fetal life