Crossing over occurs between _____.
A) the non-sister chromatids of a pair of homologous chromosomes
B) the sister chromatids of a pair of homologous chromosomes
C) the non-sister chromatids of a pair of non-homologous chromosomes
D) the sister chromatids of a pair of non-homologous chromosomes
Answer: A) the non-sister chromatids of a pair of homologous chromosomes
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Organisms carrying genes from another species are called
a. transformed. b. transgenic. c. cancerous. d. hybrids. e. vectors.
Schizophrenia and bipolar disorder are caused by _____
a. one gene, plus environmental triggers b. the same gene c. many genes, plus environmental triggers d. copy number variants, without environmental triggers e. the same mutations that cause autism spectrum disorders
Several chemical pollutants from a paper mill are released into the nearby environment. Compound A is rich in calcium and magnesium. Compound B binds tightly to all free polypeptides and proteins in the soil
Compound C is structurally similar to abscisic acid. Based on this scenario, which compound will most likely harm the surrounding vegetation, and what effect(s) will it have on the plants? A) Compound A, because these minerals will act as toxins to the plant as they are absorbed through the roots. B) Compound C, because abscisic acid inhibits the active transport of potassium ions and thus closes the stomata, which will interfere with CO2 uptake and H2O transport. C) Compound B, because it ties up free polypeptides and proteins in the soil, preventing their uptake by plants, which is critical for plant growth.
The functions of the corpus luteum include all of the following except ________
A) secretion of follicle-stimulating hormone (FSH) B) maintenance of the endometrium C) secretion of estrogen D) secretion of progesterone