Answers: Genes, alleles, nucleotide sequence

• Questions:– You share 99% of your ___________ with a

chimpanzee.– You share 60% of your ___________ with a

banana.– 50% of your ___________ came from your

mother.

• What is a gene?

Fig. 18.8

• Draw the cell cycle.• Why does the cell cycle matter?

Fig. 12.5

Mitosis

• Draw a chromosome as it would look at each stage of the cell cycle.

Fig. 5.28

Fig. 12.4

Centromere

• What is a chromosome made of?

Fig. 16.21

Histones are critical for DNA structure

What makes the dominant allele dominant?

Sickle cell?Cystic fibrosis?Huntington’s disease?Blood type?Mendel’s wrinkly peas?

• What is the central dogma of genetics?

Fig. 17.4—The Central Dogma of Genetics

Transcription Analogy

Who is the scribe?

TranslationAnalogy

Who is the chef?

Fig. 17.25

mRNA’s from 5 genes in fruit-fly embryo

Why isn’t every gene expressed in every cell?

Fig. 18.6

Gene Regulation=

Controlling if a gene makes a functional product (protein) or not

DNA methylationpg. 358

CH3

http://cnx.org/content/m26565/latest/graphics35.jpg

Euchromatin and Heterochromatin

Fig. 18.10

Fig. 18.11

Fig. 18.13

• Diagram meiosis of the X and Y chromosomes in spermatogenesis… Start with a G1 cell.