Final Flashcards

0
Q

Homozygous alleles

A

TT or tt

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1
Q

Heterozygous alleles

A

Tt

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2
Q

Punnett square

A

Used to predict probabilities of particular outcomes

Always 9:3:3:1

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3
Q

Law of segregation

A

Two alleles for a Character segregate during the formation of gametes (sex cells) so that each gamete carries only one allele error each character

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4
Q

Gamete

A

Sex cells

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5
Q

Dominant

A

When only one of the two heterozygous alleles appears to affect the trait that one is dominant

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6
Q

Recessive

A

An allele that does not appear to affect the trait

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7
Q

True breeding

A

They are purebred from parents with the same genotype

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8
Q

Allele

A

An alternative form of a gene

Example: the gene for one flower color in pea plants exists in one form for purple and in another form for white

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9
Q

Mono hybrid cross

A

A pairing in which the parent plants differ in only one character

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10
Q

Hybrid

A

The offspring of two different true breeding varieties

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11
Q

Test cross

A

Breeds an individual of unknown genotype

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12
Q

Dihybrid cross

A

Crossing organisms differing in two characters

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13
Q

Intermediate inheritance

A

The heterozygous have a phenotype that is intermediate between the phenotype a of the two homozygous

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14
Q

Polygenic inheritance

A

When two or more genes affect a single character

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15
Q

Sex linked gene

A

Any gene that is located on the sex chromosome

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16
Q

Bacteriophage

A

A virus that infects a bacteria

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17
Q

Virus

A

A package of nucleic acid wrapped in a protein coat

Always a bad thing

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18
Q

Nucleotides

A

Building blocks of nucleic acid polymers

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19
Q

DNA

A

The heritable genetic information of an organism is stored in the molecule called DNA

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20
Q

DNA replication

A

Each two strands of the double helix unzip and act as a negative for a new complementary DNA strand

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21
Q

DNA polymerase

A

Make the covalent bonds between nucleotides of the new DNA strand

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22
Q

RNA

A

Is any nucleic acid whose sugar is ribose rather than the deoxyribose of DNA

23
Q

Transcription

A

DNA is converted to RNA in this and it occurs inside of the cell

24
Translation
RNA is converted to protein outside of the cell | Nucleic acid to amino acid
25
Codon
A three letter word that codes for one amino acid this occurs in a ribosome
26
Messenger RNA
Brings info from DNA into the nucleus to cytoplasm
27
R RNA
Assembles amino acids in the right order to build proteins
28
tRNA
Transports amino acids to be made into proteins
29
Karyotype
Display of a persons 46 chromosomes
30
Genome
The complete set of genetic material in an organism
31
Histones
DNA wraps around these small proteins
32
Trisomy 21
There are 3 number 21 chromosomes (Down syndrome)
33
Duplication
When part of a chromosome is repeated
34
Deletion
When part of a chromosome is deleted
35
Inversion
When part of a chromosome is reversed
36
Translocation
Chromosome piece attaches to a non homologous chromosome
37
Transposon
Jumping genes can land in the middle of other genes and disrupt them
38
Pedigree
A family tree that records certain traits
39
Adaptation
An inherited characteristic that improves an organisms ability to survive and reproduce in a particular environment
40
Descent with modification
The accumulation of different modifications or adaptations to diverse ways of life
41
Natural selection
Individuals with inherited characteristics well suited to the environment leave more offspring on average than do other individuals
42
Fossils
Preserved remains left behind by organisms
43
The fossil record
This chronological collection of life's remains in the rock layers recorded during the passage of time
44
Artificial selection
The selective breeding of domesticated plants and animals to produce offspring with genetic traits that humans value
45
Gene pool
Consists of all the alleles in all the individuals that make up a population
46
Hardy Weinberg equilibrium
Alleles in a gene poo,are constant over time
47
Fitness
An organisms ability to reproduce
48
Bottleneck affect
Affect of a species due to natural disasters
49
Adaptive radiation
Uh evolution from a common ancestor that results in I diverse species adapted to different environments
50
Geographic isolation
Separations of populations as a result of a geographic change
51
Speciation
The origin of new species
52
Taxonomy
Identification, naming, and classification of species
53
Behavioral isolation
Two species might have different mating courtships so they cannot mate
54
Habitat isolation
They may be adapted to different environments so they cannot reproduce
55
Binomial
A two part name refers to the genus then species