Nonmendelian Genetics
Presentation
•
Biology
•
9th Grade
•
Hard
James Gonzalez
FREE Resource
4 Slides • 22 Questions
1
Non-Mendelian Genetics:
Incomplete Dominance
Codominance
Polygenic Traits
Epistasis
2
1. Make sure to grab the fill in notes from your teacher for today's lesson.
2. You will receive a grade for both your notes, and how well you do on the questions. TAKE YOUR TIME!
3. The following questions 3-7 is a recall from Mendelian Genetics.
3
Multiple Choice
How do we describe this genotype?
Tt
4
Multiple Choice
How do we describe this genotype?
TT
5
Multiple Choice
How do we describe this genotype?
aa
6
Multiple Choice
a ___________ is a letter combination of an allele
phenotype
genotype
dominant
recessive
7
Multiple Choice
a __________- is the trait that we see; black, long, blue, tall
DNA
recessive
genotype
phenotype
8
Watch the video below and complete your chart!
9
Make sure your chart is complete!
Use it to help you answer the questions on the rest of this Quizizz.
It's also a good idea to take notes on anything you didn't include in your chart!
10
Multiple Choice
Why do they call non-mendelian genetics patterns "rule breakers"?
They use RNA not DNA
Having a dominant allele doesn't necessarily mean that trait will show
There are no dominant alleles, only recessive ones in these patterns
They defy the laws of nature.
11
Multiple Choice
What happens in incomplete dominance?
the dominant allele isn't completely expressed when the recessive one is present.
both alleles are considered dominants, so both traits show up.
more than one gene works together to determine a trait
1 gene depends on another to be expressed.
12
Dropdown
13
Multiple Choice
An example of incomplete dominance is ...
Heterozygote snapdragons are pink, not red or white
Heterozygote chickens are black AND white, not just one or the other
The three alleles that affect height
The gene that controls whether llama wool color will be expressed
14
Multiple Choice
In snap dragons, Red (R) flowers is incompletly dominant to white (r) flowers. Heterozygotes are pink. If a pink plant is crossed with a pink plant, what percent of the offspring will be red?
0%
25%
50%
75%
100%
15
Multiple Choice
In snap dragons, Red (R) flowers is incompletly dominant to white (r) flowers. Heterozygotes are pink. If a red plant is crossed with a pink plant, what will the phenotypes of the offspring be?
75% red, 25% white
100% red, 0% pink
25% red, 50% pink, 25% white
50% red, 50% pink
16
Multiple Choice
What happens in codominance?
the dominant allele isn't completely expressed when the recessive one is present.
both alleles are considered dominants, so both traits show up.
more than one gene works together to determine a trait
1 gene depends on another to be expressed.
17
Multiple Choice
An example of codominance is ...
Heterozygote snapdragons are pink, not red or white
Heterozygote chickens are black AND white, not just one or the other
The three alleles that affect height
The gene that controls whether llama wool color will be expressed
18
Multiple Choice
In chickens, Black Feathers (B) and White Feathers (W) are codominant. If a black chicken and a white chicken are bred, what percent of the offspring will be black AND white?
0%
25%
50%
75%
100%
19
Multiple Choice
In chickens, Black Feathers (B) and White Feathers (W) are codominant. If a heterozygous chicken and a white chicken are bred, what percent of the offspring will be black AND white?
0%
25%
50%
75%
100%
20
Multiple Choice
What happens with polygenic traits?
the dominant allele isn't completely expressed when the recessive one is present.
both alleles are considered dominants, so both traits show up.
more than one gene works together to determine a trait
1 gene depends on another to be expressed.
21
Multiple Choice
An example of a polygenic trait is ...
Heterozygote snapdragons are pink, not red or white
Heterozygote chickens are black AND white, not just one or the other
The three alleles that affect height
The gene that controls whether llama wool color will be expressed
22
Multiple Choice
What else can impact polygenic traits like height and skin color?
environmental factors
having a pet
living in Minnesota
how many books you read
23
Multiple Choice
What happens in cases of epistasis?
the dominant allele isn't completely expressed when the recessive one is present.
both alleles are considered dominants, so both traits show up.
more than one gene works together to determine a trait
1 gene depends on another to be expressed.
24
Multiple Choice
An example of a epistasis is ...
Heterozygote snapdragons are pink, not red or white
Heterozygote chickens are black AND white, not just one or the other
The three alleles that affect height
The gene that controls whether llama wool color will be expressed
25
Match
Remember that in llamas, Black Wool (B) was dominant to Brown Wool (b). Also, Expressing Wool Color (C) is dominant to Not expressing Wool Color (c). Match each llama's genotype with their phenotype.
BbCc
bbCC
Bbcc
black wool
brown wool
white wool
black wool
brown wool
white wool
26
Multiple Choice
Why do you need larger punnett squares when making predictions about polygenic traits and cases of epistasis?
to show more than one gene is involved
to show which genes are more important than others
to show how some genes aren't carried on chromosomes
to show how Mendel was wrong
Non-Mendelian Genetics:
Incomplete Dominance
Codominance
Polygenic Traits
Epistasis
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