Chapter 2 - Genetics Flashcards

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1
Q

What was Mendel known as?

A

The father of genetics

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2
Q

What was Mendel one of the first to do?

A

To study patterns of inheritence

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3
Q

Heredity definition:

A

The passing of traits from parents to offspring

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4
Q

What did Mendel use for his study?

A

Pea plants

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5
Q

Why he used pea plants? (three reasons)

A

There are male + female parts in the same flower so easy to control mating
Pea plants grow fast
The peas only had two different types - purple and white flowers

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6
Q

Monohybrid cross definition:

A

One cross of different traits

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7
Q

What a monohybrid cross is used to examine?

A

The distribution of one set of genes during reproduction

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8
Q

Self fertilization definition:

A

Was used to determine if offspring will have same characteristics as the original parent, called a test cross

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9
Q

What self fertilization tells us?

A

If all offspring of self fertilization were identical, then the original plant was true bred

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10
Q

What do the true bred plants serve as in Mendel’s studies?

A

The parental generation, or P generation

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11
Q

What are the offspring of the parental generation called?

A

F1 generation

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12
Q

What did Mendel’s experiment all for the F1 generation?

A

It allowed for them to self fertilize, which creates the F2 generation

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13
Q

What did Mendel learn from F2 generation?

A

The traits that disappear always reappear

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14
Q

Explanation of F2 traits reappearing?

A

Organisms can carry both forms but one masks the other

For Mendel, the purple petal trait was dominant over white petal trait

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15
Q

Each gene has two forms called what?

A

Alleles

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16
Q

What is an allele made from?

A

Egg and sperm

17
Q

Principle of segregation:

A

When a parent makes sperms or eggs, their genes separate

18
Q

Gamete definition:

A

Egg or sperm

19
Q

Genotype definition:

A

The genetic makeup of an individual

20
Q

Homozygous recessive:

A

Alleles are the same, and both are dominant (TT)

21
Q

Homozygous dominant:

A

Alleles are the same, and both are recessive (tt)

22
Q

Heterozygous:

A

Alleles are different (Tt)

23
Q

Law of independent assortment:

A

Two or more pairs of alleles segregate independently of one another during gamete formation, creating at least four different outcomes