Use the Following Information to Answer the Questions Below

question 61

Multiple Choice

Use the following information to answer the questions below.
A plantlike organism on the planet Pandora can have three recessive genetic traits: bluish leaves, due to an allele (a) of gene A; a feathered stem, due to an allele (b) of gene B; and hollow roots due to an allele (c) of gene C. The three genes are linked and recombine as follows:
A geneticist did a testcross with an organism that had been found to be heterozygous for the three recessive traits and she was able to identify progeny of the following phenotypic distribution (+ = wild type) :

-What is the greatest benefit of having used a testcross for this experiment?

• A) The homozygous recessive parents are obvious to the naked eye.
• B) The homozygous parents are the only ones whose crossovers make a difference.
• C) Progeny can be scored by their phenotypes alone.
• D) All of the progeny will be heterozygous.
• E) The homozygous recessive parents will be unable to cross over.

Identify and describe altered states of consciousness, including sleep, meditation, and intoxication.

Recognize the role of circadian rhythms in regulating sleep-wake cycles.

Explain the functions and stages of sleep.

Describe the impact of sleep deprivation on mental and physical health.

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Definitions:

Sieve Tube Members

Plant cells that are part of the phloem, responsible for transporting sugars and other nutrients throughout the plant in a network of sieve tubes.

Nodules

In botany, swollen structures on plant roots that house symbiotic bacteria involved in the nitrogen fixation process.

Nitrogen-Fixing Bacteria

Microorganisms that convert atmospheric nitrogen into a form that plants can absorb and utilize, such as ammonia.

Source-To-Sink

A concept describing the movement of materials or energy from a region of production (source) to a region of storage or consumption (sink) in organisms or ecosystems.