Genetic drift is non-selective and therefore does not contribute to microevolution
Indicate whether the statement is true or false.
ANS: F, but does contribute to microevolution by changing allele frequencies
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The two copies of each type of chromosome found in normal somatic (body) cells in an organism, throughout the cell cycle, are called:
A. Homologous chromosomes B. Daughter chromosomes C. Kinetochores D. Sister chromatids
What is the blind spot, and why does it occur?
What will be an ideal response?
Prader-Willi (PW) and Angelman syndromes (AS) are imprinting disorders of the same region on chromosome 15. Normally, the genes associated with PW are ________ imprinted (silenced), and the one gene associated with AS is ________ imprinted (silenced)
A) paternally; paternally B) paternally; maternally C) maternally; paternally D) randomly; paternally E) maternally; randomly
Nerve impulses are electrical signals measured across which structure?
A. lipid sheath of Schwann cell B. plasma membrane of neuron C. synapse D. neuromuscular junction