thursday, apr 3 rd , 2014

Did you know…

The human brain is 80% water.

If you shrunk a car to the size of a cockroach, the roach could outrun the car. Cockroaches can run ~200 scale mph.

1. Are our traits determine by nature or nurture or both? Explain why you think that.

2. Why do gamete cells have haploid number of chromosomes, instead of a diploid number?

3. Curly hair (H) has incomplete dominance over straight hair (h). A wavy haired mom is crossed w/ a straight haired dad. Draw a Punnett Square & give the genotypes & phenotypes.

Change in DNA sequence

Causes: DNA Damage

UV light (sunlight), radiation, or chemicals Mistakes during DNA replication/copying

Mutations in gametes only are inheritable

Original Strand: ACG TGG CAA AGC

1. Deletion: base(s) deleted from sequence ACG TGG AAA GC

2. Inversion: section of bases flipped and re-inserted

ACG GGT CAA AGC

3. Duplication: base(s) repeated ACG ACG TTG CAA AGC

4. Insertions: base(s) inserted into sequence ACG TGG CAA TAG C

5. Translocation: bases swapped between 2 chromosomes ACG TGG CAA AGC ACG TGG TTT AGC GCA GGT TTT AGC GCA GGT CAA AGC

Recessive metabolic genetic disorder

Mutation in gene for enzyme that metabolizes amino acid phenylalanine (Phe)

 Treatment: special diet low in Phe Eliminate meats, dairy, & starches