Ch 21: Genomes

Question 1

Homeotic genes

Answer 1

Control where body parts develop in multicellular plants and animals

Question 2

HOX genes

Answer 2

Homeotic genes specific to animals

Question 3

Gene

Answer 3

Discrete unit of hereditary information consisting of a specific DNA sequence

Question 4

Genome

Answer 4

Genetic material of an organism

Question 5

How much of the human genome codes for for proteins, rRNA, and tRNA?

Answer 5

1.5%

Question 6

Genes that mutated over long periods of time and are no longer functional

Answer 6

Pseudogenes

Question 7

Organisms with high gene density

Answer 7

Bacteria / Archeia

Question 8

Organisms with low gene density

Answer 8

Eukaryotes

Question 9

Transposable elements

Answer 9

Non-coding DNA that copies random sections of DNA and moves them.
75% of reppitive DNA
33% of all DNA

Question 10

Why do fetsus produce a different form of hemoglobin than adults?

Answer 10

Alpha-globin is better at absorbing oxygen thus allowing the fetus to siphon more oxygen away from the mother who has batea-globin

Question 11

Raw materiel for evolution

Answer 11

Existing Genetic material

Question 12

Exon shuffling

Answer 12

Exons are proteins that present themselves and as a result, when moved they can continue to create proteins

Question 13

Highly concerved

Answer 13

The genes of two distantly related species both share the same functions when left over from their common ancestor

Question 14

On a tree diagram of evoulantary relationships, a branch point, or fork in the tree represents a ____ of the two lineages.

Answer 14

Divergence