Among children with parents who are both carriers of Tay-Sachs, an autosomal recessive disorder, chances are that
a. 75 percent will be carriers.
b. 50 percent will die in a few years.
c. 75 percent will not carry the recessive Tay-Sachs's allele.
d. 50 percent will be carriers.
d. 50 percent will be carriers.
You might also like to view...
The neurotransmitter receptor research of Jean-Luc Eiselé and his coworkers showed that ____
a. neurotransmitters are dependent on the activity of Na+ b. neurotransmitters are dependent on the activity of K+ c. neurotransmitters are dependent on the activity of Cl
In mitosis,
a. the chromosome number is halved. b. the chromosome number is doubled. c. the chromosome number stays the same. d. the chromosome number may double or be halved depending on the species. e. gametes are formed in bacteria only
Which term describes an animal whose behavior is tied to phases of the moon?
a. diurnal b. lunar c. parasitic d. reptilian e. nocturnal
At the end of gastrulation, the ectoderm makes up the
A) lining of the embryonic digestive tract. B) outer layer of the gastrula. C) inner layer of the gastrula.