Answer the following questions true (T) or false (F)
1. The X and Y chromosomes are not homologous, but in the meiosis of sperm formation, they pair and separate in anaphase I as though they were homologous.
2. Mendel's contribution to genetics was the discovery of DNA.
3. Mendel's crosses with pea plants disproved the notion that, when individuals with two different traits are mated, the genetic information blends in the offspring and is not retained as separate elements.
1. TRUE
2. FALSE
3. TRUE
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Which of the following is asserted by the unified cell theory?
a. The cell serves as the basic unit of life. b. All living things are composed of at least two cells. c. Very few new cells develop from existing cells. d. Organisms serve as the building blocks of cells.
Hemophilia A is
A. an X-linked dominant disorder. B. an X-linked recessive disorder. C. an X-linked recessive disorder, causing a defective blood clotting protein. D. an X-linked dominant disorder, causing a defective blood clotting protein. E. a defective blood clotting protein.
Prions are made up of only protein
Indicate whether the statement is true or false
Which of the following components of the electron-transport chain does not act as a proton pump?
(a) NADH dehydrogenase (b) cytochrome c (c) cytochrome c reductase (d) cytochrome c oxidase