Genes are located on ________.

A. chromosomes
B. mitosis
C. the cytoplasm
D. the centromere


Answer: A

Biology & Microbiology

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Which structure holds homologous chromosomes tightly together and supports them as they undergo recombination?

a. kinetochore b. centromere

c. microtubules d. spermatozoa e. synaptonemal complex

Biology & Microbiology

Which term refers to a particular set of alleles an organism carries?

a. Gene b. Phenotype c. Homozygous d. Heterozygous e. Genotype

Biology & Microbiology

What happens when an impulse reaches the end of an axon that is attached to skeletal muscle?

What will be an ideal response?

Biology & Microbiology

After removing some freshly baked cookies from the oven, you accidentally brush the side of the pan with your bare hand. Your reflexes kick in and you immediately draw your hand away. What is the proximate cause of this behavior?

A. Drawing your hand away quickly when it encounters high heat prevents injury, thereby increasing your chances to survive and reproduce. B. For millions of years, your ancestors survived in part because they avoided damaging heat, and thus were able to pass on heat-avoiding genes to you. C. You perceived the heat, judged that it would cause a burn if you left your hand in place too long, and made a conscious decision to pull your hand away. D. Sensory receptors in the skin of your hand sent a signal to interneurons in your spinal cord, which subsequently signaled the motor neurons in your arm and hand to contract, drawing your hand away.

Biology & Microbiology