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Zoology Exam Flashcards

1
Q

A cross between individuals both homozygous for two genes?

A

Dihybrid Cross

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2
Q

The alleles present in an individual

A

Genotype

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3
Q

The allele that is not expressed in the heterozygote?

A

Recessive

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4
Q

The sequence of bases in one stand of DNA specifies the sequence of the opposite strand?

A

Complimentary

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5
Q

Visible or expressed characteristics?

A

Phenotype

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6
Q

When two different alleles are present

A

Phenotype

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7
Q

A cross between the homozygous recessive with those that show the dominant phenotype

A

Testcross

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8
Q

Alleles with one gene separate into gametes randomly with respect to alleles of other genes

A

Independent Assortment

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9
Q

Strands of DNA run in opposite directions

A

Anti paraelle

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10
Q

Alleles of a gene are separated into different gametes

A

Segregation

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11
Q

Alternative form of a gene

A

Alleles

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12
Q

When one allele is not dominant to the other, but they are equal

A

Incomplete Dominance

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13
Q

When both alleles are the same

A

Homozygous

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14
Q

A cross between individuals both homozygous for one gene

A

Mono hybrid cross

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15
Q

All chromosomes besides sex chromosomes

A

Autosomes

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16
Q

The allele that is expressed when present

A

Dominant

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17
Q

Inner germ layer

A

Endoderm

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18
Q

Outer derm later

A

Exoderm

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19
Q

Individuals are both male and female

A

Monoecious

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20
Q

Eggs retained for development, nourishment derived from yolk within the egg

A

Ovoviviparous

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21
Q

Body cavity surrounded by mesoderm

A

Coelom

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22
Q

Differentiated mass of cells, forms invagination

A

Gastrula

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23
Q

3rd germ layer, between inner and outer

A

Mesoderm

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24
Q

Animals with only 2 germ layers

A

Diplosblastic

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25
Eggs retained for development, nourishment derived directly from the mother
Viviparous
26
Mass of cells formed from the zygote dividing by mitosis?
Blastula
27
Individuals are either male or female
Dioecious
28
An animal that lays eggs in the environment for development?
Oviparous
29
Body cavity surrounded by endoderm
Gut
30
List the 4 phases of mitosis in the order they occur?
P.M.A.T
31
Is mitosis asexual or sexual?
Asexual
32
Is meiosis sexual or asexual?
Sexual
33
Meiosis results in how many daughter cells?
FOUR
34
What are the daughter cells, which are sex cells, called?
Gametes
35
What do daughter cells transmit from parent to offspring?
Genetic info
36
Chromosomes share a common feature, what is this common feature?
Pairs
37
In meiosis, how many times does the cell replicate?
Once
38
What phase does crossing-over occur in?
Prophase 1
39
In Metaphase 2 Meiosis or metaphase mitosis do are they lined up in a line or 2 and 2
In a line
40
What are the sex chromosomes of a female?
X
41
What are the sex chromosomes of a male?
Xy
42
Female gametes have which possible sex chromosome?
X
43
Male gametes (sperm) have which possible sex chromosomes?
X or Y
44
The visible expressed characteristics?
Phenotype
45
The allelic combination or what the alleles are present?
Genotype
46
Describes the allele that is expressed when it is present?
Dominant
47
Describe the allele that is not expressed unless both alleles are the same?
Recessive
48
Describe when both alleles are the same?
Homozygous
49
Describe when the alleles are different?
Heterozygous
50
A cross between individuals both homozygous for ONE gene is
Monohybrid Cross
51
A cross between individuals both homozygous for TWO genes is
A dihybrid cross
52
How many genes are involved in a dihybrid cross?
4
53
Genes that are sex-linked are located on which sex chromosome?
X Chromosomes
54
What is the process in which DNA is used to make mRNA?
Transcription
55
What is the process in which mRNA is used to make proteins?
Translation
56
What type of RNA has the antibodon, and attaches the amino acids together during translation?
tRNA
57
Which type of reproduction involves one parent, requires no reproductive organs or cells and produces a genetically identical offspring?
Asexual
58
What is a genetically identical offspring called?
Clone
59
A multi-cellular organism breaks apart, and each piece grows new parts and forms a new indiviual?
Fragmentation
60
A new individual arises as an outgrowth from the parent
Budding
61
The body of the a parent divides by mitosis?
Fision
62
If the individuals of a species have bothe male and female sex organs, the species is what
Monoecious
63
Genes that are located on the C chromosome and not he Y are said to be what?
Sex-linked genes
64
What is the phenotypic ratio of the f2 generation of a monohybrid cross?
3:1
65
What is the genotypic ration of the f2 generation of a monohybrid cross?
1:2:1
66
If one allele is not dominant to the other and a cross between the two gives rise to a different pehnotype, the alleles are showing what?
incomplete dominance
67
Chromarids seperate and move to opposite poles
Anaphase
68
The cells begins to divide
Telophase
69
The centrioles replicate and move to opposite poles, the nuclear envelope disappears, and the chromosomes become visible
Prophase
70
What are the alternative forms of genes that code for the same trait occus on homologous chromosomes called?
Alleles
71
When a pair of gamates unite in fertilixation, the newly formed cells, which is diploid, is called what?
Zygote

Zoology (2 decks)

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