Liz has two sons and two daughters, and she is heterozygous for hemophilia, an X-linked condition. Which of the following will likely occur?
a. Liz will pass the disease to both sons.
b. Liz will pass carrier status to one daughter.
c. Both of Liz’s daughters will be hemophiliacs.
d. All four of Liz’s children will have carrier status.
b. Liz will pass carrier status to one daughter.
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Aminoacyl-tRNA synthetase is the enzyme that
A) folds tRNA molecules into their proper configuration. B) causes tRNA molecules to bind to the aminoacyl site of a ribosome. C) produces tRNA by reading DNA molecules. D) adds the appropriate amino acid to an uncharged tRNA.
The first group to exhibit an amniotic egg was
the a. Aves. b. Amphibia. c. Reptilia. d. Osteichthyes. e. Mammalia.
The structural combination of DNA and protein forms ________
A) nucleoli B) RNA C) chromatin D) ribosomes
A(n) __________ is a group of genes that code for related or identical proteins as a result of gene duplication events
a. ortholog b. gene family c. homolog d. chromosome e. none of the above