Hemophilia (h) is a sex-linked recessive trait. If a hemophiliac male marries a carrier female,
a) 50% of their daughters will be hemophiliac.
b) 75% of their daughters will be hemophiliac.
c) 25% of their daughters will be hemophiliac.
d) 75% of their sons will be hemophiliac.
e) 25% of their sons will be hemophiliac.
Ans: a) 50% of their daughters will be hemophiliac.
You might also like to view...
You are studying the development of a poorly-understood species at the 8-cell stage. You use a laser to zap away a certain one of the eight cells, and discover that part of the gut is missing once the embryos finish development. Your colleague, who is working on a different species, uses the laser to blast away one of the cells in her embryos, zapping each of the possible cells in a set of eight experiments. However, when the embryos finish development, every one is perfectly normal! What can you conclude about the two species?
A. The first species has regulative development, the second has non-regulative development. B. The first species has non-regulative development, the second has regulative development. C. Both species have regulative development. D. Both species have non-regulative development. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about cleavage and developmental pathways? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In performing a Gram's staining techniques, the decolorization reagent is
A. A mixture of acetone and alcohol B. A mixture of different alcohols C. A mixture of acid and alcohol D. A mixture of acetone and ether E. none of the above
Which of the following are the three phases of translation?
A. initiation, elongation, and completion B. initiation, elongation, and termination C. activation, chain growth, and completion D. addition of cap and tail, removal of exons, and RNA splicing
Some genes in bacteria are repressed by antisense RNA that binds to them.
Answer the following statement true (T) or false (F)