Please Refer to the Following Information to Answer the Next

question 59

Multiple Choice

Please refer to the following information to answer the next few questions.
Diploid nuclei of the ascomycete, Neurospora crassa, contain 14 chromosomes. A single diploid cell in an ascus will undergo one round of meiosis, followed in each of the daughter cells by one round of mitosis, producing a total of eight ascospores.
-Each of the eight ascospores present at the end of mitosis has the same chromosome number and DNA content (ng) as each of the four cells at the end of meiosis. What must have occurred in each spore between the round of meiosis and the round of mitosis?

• A) double fertilization
• B) crossing over
• C) nondisjunction
• D) autopolyploidy
• E) S phase

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Definitions:

Cognitive Coping

Strategies that involve the conscious effort to solve personal and interpersonal problems, and seeking to master, minimize, or tolerate stress or conflict.

Hypothalamus

A region of the brain responsible for the regulation of certain metabolic processes and other activities of the autonomic nervous system, including hunger and temperature control.

Adrenal Glands

Small glands located on top of each kidney which produce various hormones including adrenaline and cortisol, involved in response to stress.

Visual Cliff

An experimental apparatus used to measure infants' perception of depth and their fear of falling.