Definitions Flashcards

1
Q

animal genetics

A

the study of inheritance in animals

understanding how characteristics are passed through generations

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2
Q

animal breeding

A

the application of principles of animal genetics to genetically improve farm animals

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3
Q

Mendelian genetics

A

simple inheritance of genes that express themselves in a defined and predictable manner

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4
Q

Population genetics

A

the study of factors that affect the gene and genotypic frequencies of populations

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5
Q

Quantitative genetics

A

the branch of genetics concerned with influences on measurement of relationships among-, rate of change for-, genetic prediction of- traits that are or can be treated as quantitative

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6
Q

Molecular genetics

A

the study of the chemical nature of genes and how gene functions affect traits of living organisms

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7
Q

Genome

A

the full DNA of an organism

the entire set of an individual’s genes

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8
Q

natural selection

A

independent of deliberate human control

allows animals that are the best adapted to their environment to survive and produce the largest number of offspring

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9
Q

seedstock

A

breeding stock

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10
Q

genes

A

the basic unit of heredity consisting of a DNA sequence at a specific location on specific chromosomes

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11
Q

chromosomes

A

long strands of DNA molecules that are organized into pairs

present in nucleus of every sire (paternal) and dam (maternal)

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12
Q

Locus

A

site of a particular gene

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13
Q

alleles

A

alternative forms of a particular gene found on a particular locus on a particular chromosome

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14
Q

genotype

A

genetic constitution of an individual or cell - its molecular makeup (one-locus)

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15
Q

homozygous

A

both genes at a locus functionally same

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16
Q

heterozygous

A

genes at a locus functionally different

17
Q

meiosis

A

production of gametes (sex cells)

18
Q

segregation

A

the separation of paired genes during gamete formation

19
Q

law of segregation

-mendel’s first principle

A

when gametes are formed, the genes at a given locus separate so that each is incorporated into different gametes

20
Q

independent assortment

-mendel’s 2nd principle

A

genes assorted independently during meiosis

21
Q

embryo formation

A

union of the egg and sperm

22
Q

fertilization

A
  • outcome is a chance event
  • probability of a particular gene combination occurring in a zygote is directly related to frequency a particular gamete occurs