exam 1 chapter 4

Question 1

rna

Answer 1

single stranded chemical that can serve as a template for the synthesis of proteins

Question 2

dominant gene

Answer 2

shows a strong effect in either homozygous or heterozygous condition

Question 3

intermediate gene

Answer 3

occurs in a phenotype where there is incomplete dominance in the heterozygous condition

Question 4

autosomal genes

Answer 4

all genes except for the sex linked genes

Question 5

female

Answer 5

xx

Question 6

males

Answer 6

xy

Question 7

sex limited genes

Answer 7

genes that are present in both sexes but mainly have an effect on one sex (breast size, chest hair, etc.)

Question 8

mutation

Answer 8

heritable change in a DNA molecule

Question 9

microduplication/microdeletion

Answer 9

part of a chromosome that might appear once might appear twice or not at all

Question 10

heredity

Answer 10

refers to how much characteristics depend on genetic differences

Question 11

heritability

Answer 11

estimate of how much of the variance in some characteristic is due to heredity

Question 12

plasticity

Answer 12

refers to the idea that the brain is constantly changing throughout the lifetime

Question 13

when does CNS begin to form

Answer 13

embryo @ 2 weeks old

Question 14

proliferation

Answer 14

stage 1
production of new cells/neurons in the brain primarily occurring early in life

Question 15

migration

Answer 15

stage 2
movement of newly formed nuerons and glia to their eventual locations

Question 16

differentiation

Answer 16

stage 3
forming of the axon and dendrite that give the nueron its distinctive shape

Question 17

myelination

Answer 17

stage 4
process by which glia produce the fatty sheath that covers the axons of some nuerons
(occurs gradually for decades)

Question 18

synaptogenesis

Answer 18

stage 5
formation of synapses between nuerons