Which of the following statements correctly describes a quantitative trait?
A. People who are homozygous for the group of genes associated with skin pigment have either lighter or darker skin than those who are heterozygous for those genes.
B. The alleles of the gene for red hair color is masked by the gene for brown hair color.
C. A person heterozygous for dwarfism will always have the dwarf phenotype.
D. A woman who has one allele for color blindness will not be color blind, but a man who has one allele for color blindness will be color blind.
E. 25% of the offspring from a cross of two fruit flies that are heterozygous for curly wings will have curly wings.
A. People who are homozygous for the group of genes associated with skin pigment have either lighter or darker skin than those who are heterozygous for those genes.
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The type of genetic engineering that involves isolating genes from one species and introducing them into another is called _____ technology
A. Sanger sequencing B. palindromic C. recombinant DNA D. DNA hybridization E. Sanger recombination
Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
A. Some of the organisms depicted by the tree had lived in different habitats. B. None of the organisms depicted by the tree ate the same foods. C. Relationships between DNA sequences among the species did not match relationships between skeletal patterns. D. The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing). E. Transitional fossils had not been found.
Prion diseases are always fatal and there is no treatment
a. True b. False
What is the main digestive function of the pancreas?
A) It produces digestive enzymes and bile. B) It produces bile. C) It produces digestive enzymes and neutralizes stomach acids. D) It secretes mucus into the small intestine.