Chapter 3 Textbook Flashcards

(47 cards)

1
Q

What is a genome?

A

Each person’s complete set of hereditary information; the complete set of DNA of any organism, including all of its genes

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2
Q

What is genotype?

A

The genetic material an individual inherits

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3
Q

What is phenotype?

A

The observable expression of the genotype, including both body characteristics and behavior

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4
Q

What is the environment?

A

Every aspect of individuals and their surroundings other than genes

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5
Q

What are chromosomes?

A

Molecules of DNA that transmit genetic information; chromosomes are made up of DNA

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6
Q

What is DNA?

A

Molecules that carry all the biochemical instructions involved in the formation and functioning of an organism

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7
Q

What are genes?

A

Sections of chromosomes that are the basic unit of heredity in all living things

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8
Q

What are sex chromosomes?

A

The chromosomes (X and Y) that typically correlate to an individual’s assigned sex at birth

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9
Q

What are endophenotypes?

A

Intermediate phenotypes, including the brain and nervous systems, that do not involve overt behavior

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10
Q

What are alleles?

A

Two or more different forms of a gene

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11
Q

What is a dominant allele?

A

The allele that, if present, gets expressed

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12
Q

What is a recessive allele?

A

The allele that is not expressed if a dominant allele is present

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13
Q

What is the dominant-recessive pattern?

A

A person can inherit two of the same allele-two dominant or two recessive and thus be homozygous for the trait in question

Or The person can inherit two different alleles - one dominant and the other recessive and thus be heterozygous for the trait

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14
Q

What is homozygous?

A

Having two of the same allele for a trait

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15
Q

What is heterozygous?

A

Having two different alleles for a trait

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16
Q

What is carrier genetic testing?

A

Genetic testing used to determine whether prospective parents are carriers of specific disorders

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17
Q

What is prenatal testing?

A

Genetic testing used to assess the fetus’s risk for congenital abnormalities

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18
Q

What is newborn screening?

A

Tests used to screen newborn infants for a range of genetic and nongenetic disorders

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19
Q

What are the parental contributions to the child’s environment?

A

Parents’ behavior toward their children is genetically influenced, as are the kinds of preferences, activities, and resources to which they expose their children

20
Q

What is heritable?

A

Refers to characteristics or traits that are genetically transmitted

21
Q

What is a twin-study design?

A

A specialized form of the family study used to compare the correlations for identical twins with those for same-sex fraternal

22
Q

What is the equal environments assumption?

A

The claim is that both types of twins shared the same prenatal environment were born at the same time grew up in the same family and community and are always the same age when tested.

23
Q

What is an adoption study?

A

Researchers examine whether adopted children’s scores on a given measure are correlated more highly with those of their biological parents and siblings or with those of their adoptive parents and siblings

24
Q

What is a neuron?

A

Cells that are specialized for sending and receiving messages between the brain and all parts of the body as well as within the brain itself

25
What is the three main components of a neuron?
Cell body Dendrites Axon
26
What is the cell body?
A component of the neuron that contains the basic biological material that keeps the neuron functioning
27
What are the dendrites?
Neural fibers that receive input from other cells and conduct it toward the cell body in the form of electrical impulses
28
What is an axon?
Neural fibers that conduct electrical signals away form the cell body to connections with other neurons
29
What are the synapses?
Microscopic junctions between the axon terminal of one neuron and the dendritic branches or cell body of another where neurons communicate
30
What are glial cells?
Cells in the brain that provide a variety of critical supportive functions
31
What is the myelin sheath?
A fatty sheath that forms around certain axons in the body and increases the speed and efficiency of information transmission
32
What is the cerebral cortex?
The "gray matter" of the brain, consisting of four distinct lobes
33
What is the occipital lobe?
Major area of the cortex that is primarily involved in processing visual information
34
What is the temporal lobe?
Major area of the cortex that is associated with speech and language, music, and emotional information
35
What is the parietal lobe?
Major area of the cortex that is associated with spatial processing and sensory information integration
36
What is the frontal lobe?
Major area of the cortex that is associated with working memory and cognitive control
37
What are the association areas?
Parts of the brain that lie between the major sensory and motor areas and that process and integrate input from those areas
38
What are the cerebral hemispheres?
The two halves of the cortex
39
What is the corpus callosum?
A dense tract of nerve fibers that enable the two hemisphere of the brain to communicate
40
What is cerebral lateralization?
The specialization of the hemispheres of the brain for different modes of processing
41
What is neurogenesis?
The proliferation of neurons through cell division
42
What is arborization?
Formation of new dendritic trees and branches
43
What are spines?
Formations on the dendrites of neurons that increase the dendrites capacity to form connections with other neurons
44
What is myelination?
The formation of myelin around the axons of neurons that speeds and increases information-processing abilities
45
What is synaptogenesis?
The process by which neurons form synapses with other neurons, resulting in trillions of connections
46
What is synaptic pruning?
The normal developmental process through which synapses that are rarely activated are eliminated
47
What are secular trends?
Marked changes in physical development that have occurred over generations