Human Identity Project
Storyboard Text
- Did you know humans share 99.9% of DNA? Our genome is made up of a 3 billion base pair, still leaving around 3 million to be different, causing us to look different from one another.
- Mendelian Genetics are traits parents pass down to their offspring. There are dominant alleles, and recessive alleles. Capital letters are dominant while under case are recessive. Same alleles= homozygous alleles, which whatever it represents, the baby gets. If different letters, heterozygous, the uppercase, dominant allele, will appear on the child like a widow's peak, which is dominant. The dominant allele over rules the recessive trait
- Incomplete Dominance is where there is no dominant allele that masks another allele. When it's a Heterozygous (different alleles) it creates another physical trait, third option, like a loop finger print.
- FF Ff ff
- Co-dominance is where there is no dominant or recessive gene. Instead they are equal and both physically show as traits like a spotted cow. One gene is whole white coat, while another is brown. If hetero, they both show up as a spotted white and brown cow, it's not like incomplete dominance where is creates a hole new trait, it combines both traits
- An example of Polygenic Inheritance is skin color. It is influenced by more than 2 genes, because of this, it does not follow Mendelian Inheritance. It could also be influenced by the environment.
- Blood Type is an example of multiple alleles. In this graph, you can see the phenotypes that make up the different kinds. When type A and B have an "i", it means it was mixed with type O. There are 3 alleles that make up the blood type, not 2.
- Claim: Mutations Meiosis Explain Human Genetic Variability
- Evidence:
- Reasoning:During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation
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