Crossing over takes place between sister chromatids during prophase I of meiosis I
Indicate whether the statement is true or false
FALSE
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The myoglobin protein, which carries oxygen in muscle cells, has only the first three levels of protein structure. What can you infer about myoglobin?
A. Myoglobin is made of nucleic acids B. Myoglobin lacks hydrogen bonds C. Myoglobin is made of only one polypeptide chain D. Myoglobin is not helical or pleated
Honeybees must maintain specific temperatures to thrive. On hot days, the hive can quickly
overheat, so some bees will stand near the entrance and fan their wings to provide cool air currents into the hive. In winter, honeybees cluster together in their hives and vibrate their wings in a form of shivering to generate heat and maintain the hive at a constant temperature. This heating and cooling is a form of
a. homeostasis. b. evolution. c. competition. d. homology
Random segregation of chromosomes (by itself) means that a particular daughter cell
a. has some paternal chromosomes and some maternal chromosomes. b. has only paternal chromosomes. c. has only maternal chromosomes. d. has chromosomes containing genes from the paternal and maternal chromosomes. e. has some paternal chromosomes and some maternal chromosomes and has chromosomes containing genes from the paternal and maternal chromosomes.
Body cells of human males contain _____
a. one X chromosome b. two X chromosomes c. one Y chromosomes d. two Y chromosomes e. one X and one Y chromosome