Sickle-cell disease is caused by ___________.
A. a heterozygous situation
B. a recessive allele
C. the parasite that also causes malaria
D. sexual dimorphism
B. a recessive allele
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Hot carbol fuchsin is the primary dye in the acid-fast stain.
Answer the following statement true (T) or false (F)
This organism would belong to which group of animals?
1.sponges
2.jellyfishes
3.echinoderms
4.chordates
The ability to taste PTC is a dominant trait. If a heterozygote woman has a child with a man who is not a taster, what is the chance their child will be a taster?
A. 50% B. 25% C. 100% D. 0% E. 75%
A mutation in the gene encoding the integrase enzyme renders the protein non-functional. How would this affect-the HIV infection cycle?
A. The viral DNA would not be able to integrate the viral genome into a chromosome. B. The gp120 glycoprotein would not be able to bind the CCR5 receptor. C. Cutting and assembling the capsid would be halted. D. Reverse transcription would not be possible.