KWBAT identify dominant and recessive genes and predict which traits will be visible based on gene versions.
Part 1: Do Now
The image below shows three spiders who have different gene versions for silk stickiness. Use what is given to answer your warm up questions!
Question 1
1.
Question 2
2.
Question 3
3.
Spider A and Spider B have identical traits (Sticky Silk). The spiders do not have the same parents but they have identical traits. How is it possible that they can have the same traits even if they do not have the same parents?
CFS:
*Passing of genes, random or selected?
*How are gene combinations determined?
*Are Gene combinations always the same?
Question 4
4.
Question 5
5.
Part 2: Introduction to Dominant and Recessive Traits
Question 6
6.
Question 7
7.
Question 8
8.
Question 9
9.
Part 3: Dominant and Recessive Genes Practice
Question 10
10.
Identify the following combinations of gene versions as heterozygous or homozygous. Then, decide which trait would show up (the first row is done for you).
CFS:
*What makes it dominant or recessive?
*Homozygous dominant/homozygous recessive or heterozygous?
Question 11
11.
An individual with the gene version “Yy” would have a yellow body; why wouldn’t they have a blue body?
CFS:
*Did I use the table to review the genotypes and phenotypes?
*What makes a color show?
Part 4: Exit Ticket
Question 12
12.
Look back at the do now. Which gene version is recessive: S1 or S2? Explain how you know.
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Finished early?
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Try these:
Legends of Learning Game Set 1
Legends of Learning Game Set 2
Blooket Set 1
Blooket Set 2
Dragons Genetics Game
Which gene version seems to cause stickiness: S1 or S2?
S1
S2
Which gene version seems to cause silk to not be sticky: S1 or S2?
S1
S2
Which spider(s) has a homozygous gene version?
Spider A = S1S1
Spider B = S1S2
Spider C = S2S2
Spider A
Spider B
Spider C
Which spider(s) has a heterozygous gene version?
Spider A = S1S1
Spider B = S1S2
Spider C = S2S2
Spider A
Spider B
Spider C
Summarize: if an organism has a dominant gene version and a recessive gene version for a particular trait, which one will be visible?
Both (they will blend)
The recessive version
The dominant version
Neither (they will cancel out)
Summarize: if an organism has only a recessive gene version for a particular trait, which one will be visible?
The recessive version
Neither (they will cancel out)
Both (they will blend)
The dominant version
A = red color
a = blue color
If A is dominant, and a is recessive, which gene combinations will result in red colors?
CFS:
*What makes it dominant or recessive?
*Homozygous dominant/homozygous recessive or heterozygous?
Select all that apply.
Aa
AA
aa
A = red color
a = blue color
If A is dominant, and a is recessive, which gene combinations will result in blue colors?
CFS:
*What makes it dominant or recessive?
*Homozygous dominant/homozygous recessive or heterozygous?
Aa
AA
aa
Identify if the gene version is heterozygous or homozygous, then decide which trait would show up (dominant or recessive)
Gene Version = TT
Heterozygous
Homozygous
Dominant
Recessive
Identify if the gene version is heterozygous or homozygous, then decide which trait would show up (dominant or recessive)
Gene Version = cc
Heterozygous
Homozygous
Dominant
Recessive
Identify if the gene version is heterozygous or homozygous, then decide which trait would show up (dominant or recessive)
Gene Version = Bb
Heterozygous
Homozygous
Dominant
Recessive
Identify if the gene version is heterozygous or homozygous, then decide which trait would show up (dominant or recessive)