If the frequency of hemophilia, an X-linked recessive disease, is 10% in males, what is the frequency of females with hemophilia (assuming that the population is in Hardy-Weinberg equilibrium)?
What will be an ideal response?
1%
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The anticodon determines which amino acid is linked to its tRNA
Indicate whether this statement is true or false.
Why are epithelial membranes not very thick?
A. Epithelial tissues can only reach a certain thickness because their growth is constrained by microtubules inside the cell membrane. B. Thick epithelial tissues would collapse due to the drying effect of the environment. C. Epithelial tissues are programmed to stop dividing after only a few cell cycles. D. Epithelial tissues are required to support other cells growing on top of the tissue. E. Epithelial tissues play a critical role in transport and must be thin to allow diffusion to occur.
All of the following animals are likely to undergo parthenogenesis EXCEPT
A. lizards. B. insects. C. humans. D. flatworms. E. fish.
All of the following are polysaccharides, except
A. agar used to make solid culture media. B. prostaglandins in inflammation. C. cellulose in certain cell walls. D. dextran in some bacterial slime layers. E. a cell's glycocalyx.