B cells undergo ____ , where a specific cell will divide in response to its associated antibody recognizing an antigen
Fill in the blank with the appropriate word.
clonal selection
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In meiotic non-disjunction, meiotic products can be n+1, n-1, or n depending on when non-disjunction occurs
For the n+1 product can you tell if non-disjunction occurred in meiosis I or II if the non-disjunction happened to an autosome? What about a sex chromosome? A. No; yes B. No; no C. Yes; yes D. Yes; no
The Ebola virus causes ________.
A. pulmonary syndrome B. encephalitis C. lassa fever D. hemorrhagic fever
A gene is a DNA sequence that codes for a
protein or
a. RNA. b. DNA. c. ribosomes. d. a lipid. e. more than one of these.
In the ABO blood type system in humans, there are _________ different alleles, ____________ different phenotypes, and ____________ different genotypes.
a) six; three; six b) three; four; three c) six; six; three d) six; six; four e) three; four; six