Suppose that a hemophilic male (X-linked recessive
allele) and a female carrier for the hemophilic trait
have a nonhemophilic daughter with Turner
syndrome. Nondisjunction could have occurred in
a. both parents.
b. neither parent.
c. the father only.
d. the mother only.
e. none of these.
Answer: c
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Which feature is common to the hagfish, lamprey, cartilaginous fish, and amphibians?
a. Bony appendages b. Swim bladder or lungs c. Jaws d. Backbone e. Braincase
The maximum number of electrons in a shell is
a. two. b. four. c. six. d. eight. e. ten.
. In Mendel's crosses, pure-breeding individuals were always in the ____________________
generation. Fill in the blank(s) with the appropriate word(s).
A distinctive feature of spirochetes is the presence of
A. endoflagella. B. nucleosomes. C. fimbriae. D. variable surface antigens. E. helically arranged pili.