Dominant and Recessive
Presentation
•
Science
•
7th - 10th Grade
•
Hard
James Gonzalez
FREE Resource
3 Slides • 9 Questions
1
Genotypes: Dominant and Recessive Alleles
2
Genotype Structure
Genotype: A two letter code that represents the passing of genes from parent to offspring.
Allele: An allele is represented by each of the letters. There are two alleles per Genotype.
3
How Genotypes are written
Genotypes are written just like you write your name: The capital letter(s) always come first.
There are three different kinds of Genotypes: Homozygous dominant, homozygous recessive, and heterozygous.
When writing a genotype, you use the same letter for each allele (the difference lies within whether it is dominant or recessive).
Example: AA, aa, and Aa
4
Multiple Choice
Which of the following best represents a Genotype?
Aa
aA
Ab
5
Multiple Choice
What does the term homozygous mean?
The same allele variation is present.
Different allele variations are present.
6
Multiple Choice
Which of the following is Homozygous dominant?
aa
Aa
AA
7
Multiple Choice
Which of the following is Homozygous recessive?
Aa
aa
AA
8
Multiple Choice
Which of the following best represents describes heterozygous?
Same allele variation present.
Different allele variation present.
9
Multiple Choice
Which of the following represents a Heterozygous genotype?
AA
Aa
aa
10
Multiple Choice
What kind of Genotype is this: BB
Homozygous dominant
Homozygous recessive
Heterozygous
11
Multiple Choice
What kind of genotype is this: gg
Homozygous dominant
Homozygous recessive
Heterozygous
12
Multiple Choice
What kind of genotype is this: Hh
Homozygous dominant
Homozygous recessive
Heterozygous
Genotypes: Dominant and Recessive Alleles
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