ANHB1101 Exam study questions \| \| \| \|
with answers \|
What is Blending Inheritance? - CORRECT ANSWERS ✔✔Darwin
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could not explain how favourable traits were passed down to the
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following generation. He knew that offspring tended to resemble
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their parents but he couldn't explain the mechanism. This was one
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of Darwin's challenges alongside time.
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The prevailing thought at the time was 'Blending Inheritance'
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which is when the offspring displays a mixture of the traits
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displayed by the parents. This concept didn't sit right with Darwin
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because if the 'red' was an advantageous trait and the following
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generation was 'pink', then you have lost that advantageous trait. \| \| \| \| \| \| \| \| \| \|
Therefore, Blending inheritance would diminish the advantageous \| \| \| \| \| \| \|
traits within a population. \| \| \|
How do new traits arise? How are new genetic combinations
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created? - CORRECT ANSWERS ✔✔Mutations in genes and \| \| \| \| \| \| \| \|
chromosomes produce new variations which are passed on to \| \| \| \| \| \| \| \| \|
subsequent generations. This was how Darwin tried to explain \| \| \| \| \| \| \| \| \|
how variation arises.
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What is Mendel's 5 laws of inheritance? - CORRECT ANSWERS
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✔✔1. Inheritance is particulate, not blending.
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2. Each individual carries a pair of alleles for each trait.
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3. Alleles exhibit dominant or recessive expression.
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4. During formation of gametes, each allele of a pair travels into
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its own gamete. (Principle of Segregation)
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, 5. Alleles controlling a trait reach gametes independently of
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alleles controlling other traits. (Principle of Independent
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Assortment)
VOCAB: Population. - CORRECT ANSWERS ✔✔A group, within a
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species of interbreeding individuals and their offspring in the
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same geographic location. \| \|
VOCAB: Gene. - CORRECT ANSWERS ✔✔The unit of inheritance
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affecting the characteristics of a trait. \| \| \| \| \|
VOCAB: Allele. - CORRECT ANSWERS ✔✔One of two or more
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alternative expressions of a gene. \| \| \| \|
VOCAB: Genotype. - CORRECT ANSWERS ✔✔The genetic makeup
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of an Individual.
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VOCAB: Gene Pool. - CORRECT ANSWERS ✔✔All genes in the eggs
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& sperm in a population.
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VOCAB: Phenotype. - CORRECT ANSWERS ✔✔The expression of
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the genotype and the environment.
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How do new traits arise? - CORRECT ANSWERS ✔✔Mutation:
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A spontaneous error in DNA replication leading to a heritable
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change in an individuals genome. It is NOT a change in the
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genetic code. (Relethford) \| \|
with answers \|
What is Blending Inheritance? - CORRECT ANSWERS ✔✔Darwin
\| \| \| \| \| \| \| \|
could not explain how favourable traits were passed down to the
\| \| \| \| \| \| \| \| \| \| \|
following generation. He knew that offspring tended to resemble
\| \| \| \| \| \| \| \| \|
their parents but he couldn't explain the mechanism. This was one
\| \| \| \| \| \| \| \| \| \| \|
of Darwin's challenges alongside time.
\| \| \| \|
The prevailing thought at the time was 'Blending Inheritance'
\| \| \| \| \| \| \| \| \|
which is when the offspring displays a mixture of the traits
\| \| \| \| \| \| \| \| \| \| \|
displayed by the parents. This concept didn't sit right with Darwin
\| \| \| \| \| \| \| \| \| \| \|
because if the 'red' was an advantageous trait and the following
\| \| \| \| \| \| \| \| \| \| \|
generation was 'pink', then you have lost that advantageous trait. \| \| \| \| \| \| \| \| \| \|
Therefore, Blending inheritance would diminish the advantageous \| \| \| \| \| \| \|
traits within a population. \| \| \|
How do new traits arise? How are new genetic combinations
\| \| \| \| \| \| \| \| \| \|
created? - CORRECT ANSWERS ✔✔Mutations in genes and \| \| \| \| \| \| \| \|
chromosomes produce new variations which are passed on to \| \| \| \| \| \| \| \| \|
subsequent generations. This was how Darwin tried to explain \| \| \| \| \| \| \| \| \|
how variation arises.
\| \|
What is Mendel's 5 laws of inheritance? - CORRECT ANSWERS
\| \| \| \| \| \| \| \| \| \|
✔✔1. Inheritance is particulate, not blending.
\| \| \| \| \|
2. Each individual carries a pair of alleles for each trait.
\| \| \| \| \| \| \| \| \| \| \|
3. Alleles exhibit dominant or recessive expression.
\| \| \| \| \| \| \| \|
4. During formation of gametes, each allele of a pair travels into
\| \| \| \| \| \| \| \| \| \| \| \| \|
its own gamete. (Principle of Segregation)
\| \| \| \| \|
, 5. Alleles controlling a trait reach gametes independently of
\| \| \| \| \| \| \| \| \| \|
alleles controlling other traits. (Principle of Independent
\| \| \| \| \| \| \|
Assortment)
VOCAB: Population. - CORRECT ANSWERS ✔✔A group, within a
\| \| \| \| \| \| \| \| \|
species of interbreeding individuals and their offspring in the
\| \| \| \| \| \| \| \| \|
same geographic location. \| \|
VOCAB: Gene. - CORRECT ANSWERS ✔✔The unit of inheritance
\| \| \| \| \| \| \| \| \|
affecting the characteristics of a trait. \| \| \| \| \|
VOCAB: Allele. - CORRECT ANSWERS ✔✔One of two or more
\| \| \| \| \| \| \| \| \| \|
alternative expressions of a gene. \| \| \| \|
VOCAB: Genotype. - CORRECT ANSWERS ✔✔The genetic makeup
\| \| \| \| \| \| \| \|
of an Individual.
\| \|
VOCAB: Gene Pool. - CORRECT ANSWERS ✔✔All genes in the eggs
\| \| \| \| \| \| \| \| \| \| \|
& sperm in a population.
\| \| \| \|
VOCAB: Phenotype. - CORRECT ANSWERS ✔✔The expression of
\| \| \| \| \| \| \| \|
the genotype and the environment.
\| \| \| \|
How do new traits arise? - CORRECT ANSWERS ✔✔Mutation:
\| \| \| \| \| \| \| \|
A spontaneous error in DNA replication leading to a heritable
\| \| \| \| \| \| \| \| \| \|
change in an individuals genome. It is NOT a change in the
\| \| \| \| \| \| \| \| \| \| \| \|
genetic code. (Relethford) \| \|
