Biology vocab chapter 12 Flashcards

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1
Q

The scientific study of biological inheritance

A

Genetics

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2
Q

Process in sexual reproduction in which male and female reproductive cells join to form a new cell

A

Fertilization

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3
Q

Specific characteristics of an individual

A

Trait

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4
Q

Offspring of crosses between parents with different traits

A

Hybrid

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5
Q

sequence of DNA that codes for a protein and thus determines a trait

A

Gene

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6
Q

one of different forms of a gene

A

Allele

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7
Q

Mendel’s second conclusion, which states that some alleles are dominant and others are recessive

A

Principle of dominance

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8
Q

Separation of alleles during gamete formation

A

Segregation

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9
Q

sex cell

A

Gamete

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10
Q

The likelihood that a particular event will occur

A

Probability

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11
Q

Having two identical alleles for a particular gene

A

Homozygous

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12
Q

Having two different alleles for a particular gene

A

Heterozgous

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13
Q

Physical characteristics of an organism

A

Phenotype

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14
Q

Genetic makeup of an organism

A

Genotype

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15
Q

Diagram that can be used to predict the genotype and phenotype combinations of a genetic cross

A

Punnett square

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16
Q

One of Mendel’s principles that states that genes for different traits can segregate independently during the formation of gametes

A

Independent assortment

17
Q

Cases in which one allele is not completely dominant over another

A

incomplete dominance

18
Q

A situation in which the phenotypes produced by both alleles are clearly expressed

A

Codominance

19
Q

A gene with more than two alleles

A

Multiple alleles

20
Q

Traits controlled by two or more genes

A

Polygenic trait

21
Q

In chromosomes, one set comes from the male parent and one set comes from the female parent

A

Homologous

22
Q

A cell with two sets of homologous chromosomes

A

Diploid

23
Q

Term used to refer to a cell that contains only a single set of genes

A

Haploid

24
Q

A process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell

A

Meiosis

25
Q

Structure containing four chromatids that forms during meiosis

A

Tetrad

26
Q

Process in which homologous chromosomes exchange portions of their chromatids during meiosis.

A

Crossing over