Chapter 10.9 Flashcards

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1
Q

Why was medels data easy to infer inheritance

A

because he observed characteristics determined by

  1. a single gene
  2. with 2 distinguished alleles
  3. with no known effect from the environment
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2
Q

Why are some inheritances not easy to predict

A
  1. mutiple genes
  2. the environment
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3
Q

Example of how the environment can alter phenotype

A
  1. temperature
  2. alcohol
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4
Q

POLYGENIC

A

a phenotye reflects the activities of more than one gene

eg. male pattern baldness, eye color, height ( polygenic and environmental)

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5
Q

examples of phenotypes that are affected by both environment and are polygenic

A
  1. height
  2. skin color
  3. body weight
  4. intelligence
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6
Q

How can the environment affect a phenotype

A

Environment can affect a phenotype in a variety of ways. Temperature can influence gene expression of temperature-sensitive alleles; infectious agents can intensify a genetic disorder; upbringing and nourishment will affect temperament and physical health

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7
Q

What is a polygenic trait?

A

A polygenic trait is one that is controlled by many genes

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8
Q
A
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