Which of the following scenarios would erroneously lead you to believe two genes reside on different chromosomes when they in fact are on the same chromosome?
A) too large a sample size
B) the genes are very far apart on the same chromosome, such that there is never a crossover between them
C) the genes are very far apart on the same chromosome, such that there is always a crossover between them
D) a mating between consanguineous individuals
E) the genes are very close together on the chromosome, such that there is never a crossover between them
Answer: C
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Which of the following accurately characterizes the early cleavage divisions in most animals, although not necessarily in mammals?
A. They do not involve an increase in the size of the zygote. B. They are directed by the zygote's genome. C. They are relatively slow. D. They do not occur at the same time, so at any given moment the zygote may have an odd number of cells. E. All of these choices are correct.
Answer the following statements true (T) or false (F)
1. If a molecule is added to a glass of water, and is easily dissolved by the water, the added molecule is described as hydrophilic. 2. Cohesion is a property of water in which water molecules tend to stick together. 3. A peptide bond is a covalent bond formed between the amino group of one amino acid and the R group of another amino acid. 4. A substance in which other substances dissolve is called a solute. 5. Vegetable oil is an unsaturated fat from multiple plant sources. Because it is unsaturated, it is composed of at least one pair of double-bonded carbons.
The most common respiratory pigments in animals are:a
myoglobin and hemocyanin. b. myoglobin and hemoglobin. c. hemocyanin and hemoglobin. d. mucus and hemoglobin. e. pulmonary surfactant and myoglobin.
Unicellular fungi are called _________.
Fill in the blank(s) with the appropriate word(s).