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BIO 1B Lab 2 Darwinian Snails Part 1

Biology19 CardsCreated 4 months ago

This deck covers essential concepts from the BIO 1B Darwinian Snails Lab, focusing on evolution, genetics, and protein synthesis.

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What are the three conditions for evolution by natural selection?

1. variation 2. variation is heritable 3. individuals with some form of the trait leave more offspring than others
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Key Terms

Term
Definition
What are the three conditions for evolution by natural selection?
1. variation 2. variation is heritable 3. individuals with some form of the trait leave more offspring than others
While ducks were evolving webbed feet: (a) With each generation, most ducks had about the same amount of webbing on their feet as their parents. (b) With each generation most ducks had a tiny bit more webbing on their feet than their parents. Which is correct? Are both correct?
Only A is correct
Offspring tend to resemble their parents if the trait is __________.
heritable
Why does evolution happen?
Evolution happens because some parents leave more offspring than others.
The populations of ducks evolved webbed feet because: (a) The more successful ducks adapted to their aquatic environment. (b) The less successful ducks died without offspring. A. Only the top statement is correct. B. Only the bottom statement is correct. C. Both statements are correct. D. Neither statement is correct.
B.
True of False: Evolution happens in more than one generation.
true
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BIO 1B Lab 2 Darwinian Snails Part 1
TermDefinition
What are the three conditions for evolution by natural selection?
1. variation 2. variation is heritable 3. individuals with some form of the trait leave more offspring than others
While ducks were evolving webbed feet: (a) With each generation, most ducks had about the same amount of webbing on their feet as their parents. (b) With each generation most ducks had a tiny bit more webbing on their feet than their parents. Which is correct? Are both correct?
Only A is correct
Offspring tend to resemble their parents if the trait is __________.
heritable
Why does evolution happen?
Evolution happens because some parents leave more offspring than others.
The populations of ducks evolved webbed feet because: (a) The more successful ducks adapted to their aquatic environment. (b) The less successful ducks died without offspring. A. Only the top statement is correct. B. Only the bottom statement is correct. C. Both statements are correct. D. Neither statement is correct.
B.
True of False: Evolution happens in more than one generation.
true
Is it possible for an individual to evolve?
no
Why would blending inheritance be a problem for evolution by natural selection?
One trait can be blended away as an individual reproduces, instead of being acted upon by natural selection
What is the meaning of segregation according to Mendel?
offspring only always receives one allele from each parent.
What is the meaning of independent assortment?
alleles for separate traits are passed on independently
All living things are made largely of ________.
protein
Proteins are strings of _____ ______.
amino acids
The shape of the protein depends on what?
the shape of the amino acid in the beginning.
The shape of amino acids in the beginning determines the _________ of the protein.
function
True of False: all amino acids have the same shape.
false. difference shapes = different amino acids
What provides the 'recipe' for proteins?
RNA
What are the proteins where DNA is wound around?
histones
Segments of DNA whose nucleotides code for_______ or _____ or regulate the expression of other genes
proteins or RNA
How many genes does the human genome have?
20,000