Exam 1 W 210 in class bring cheat
Exam #1 W 2/10 in class (bring cheat sheet) Review T 2/9 from 5 -7 pm, place TBA
Genotype Phenotype Genes code for proteins (or RNA). These gene products give rise to traits… It is rarely this simple.
Fig 14. 11 Human blood types Codominance: both alleles are fully expressed phenotype genotype AA or AO BB or BO AB (Codominance) OO
Fig 14. 10 Incomplete dominance gives rise to blending.
Fig 15. 6 Sex determination is normally inherited by whole chromosomes or by number of chromosomes.
Fig 15. 6 X/Y chromosomes in humans
The X chromosome has many genes; the Y chromosome only has genes for maleness.
Human X and Y chromosomes
Fig 15. 6 X/Y chromosomes in humans should give rise to equal numbers of males and females
105 males : 100 females (live births) Why?
105 males : 100 females (live births) Why?
Ratio of males to females, by age group (number of males per 100 females)
Sex-linked traits are genes located on the X chromosome Fig 15. 6
Color Blind Test
Sex-linked traits: Genes on the X chromosome A= normal; a= colorblind normal colorblind Fig 15. 7 No one affected, female carriers
Sex-linked traits: Genes on the X chromosome A= normal; a= colorblind normal Fig 15. 7 normal 50% of males affected, 0 % females affected
Fig 15. 7 Sex-linked traits: Genes on the X chromosome A= normal ; a= colorblind No one affected, female carriers 50% of males affected, 0 % female affected 50% males affected, 50% females affected
Fig 15. 16 Down syndrome is caused by too much information…trisomy 21, three of chromsome 21
How do females compensate for having two X chromosomes? Fig 15. 6
X inactivation in mammals: females are a mosiac of inactivated X chromosomes Fig 15. 8
Is this all of your DNA?
Mitochondria have their own DNA.
Both Mitochondria and Chloroplast have DNA
Endosymbiotic Theory - proposed origin of mitochondria and chloroplasts from free-living bacteria to cellular organelles Fig 25. 9
Human Life Cycle Combination of two individuals DNA
Only the egg provides mitochondria to the offspring. Fig 47. 3 mitochondria
Human Life Cycle In females Mom provides 50. 000275% and Dad provides 49. 999825% of DNA to offspring. … because Mom provides 100% of mitochondrial DNA
Exam #1 W 2/10 in class (bring cheat sheet) Review T 2/9 from 5 -7 pm, place TBA
- Slides: 28