Biology - Chapter 9 Vocab

21 terms by ashnape93 

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pollination

the transfer of pollen grains from the anther to the stigma of a flower

Punnett square

chart used to determine the possible results of a genetic cross

P1 generation

the parent generation when doing a genetic cross

heterozygous

two different alleles in an organism's genotype

recessive

the gene that can be hidden when an individual is heterozygous

testcross

crossing an individual of unknown genotype with a recessive individual

homozygous

two of the same alleles in an individual's genotype

F1 generation

the first generation of offspring in a genetics experiment

cross pollination

when pollen from one plant is transferred to the stigma of another

trait

one particular attribute of an organism, such as height or flower color

codominance

when both alleles contribute to the phenotype of an individual

genotype

the combination of genes an individual has

dominant

an allele that can mask the presence of the other allele, stronger gene

complete dominance

pattern of heredity in which one allele can completely hide the other

F2 generation

the second generation of offspring in a genetic cross, produces a 3:1 ratio in a monohybrid cross

phenotype

the trait that appears in an organism, a description of the organism

Law of Segregation

describes the separation of alleles in gamete formation, each gamete gets just one

allele

one of the alternate forms of a gene for a specific trait

incomplete dominance

when one allele cannot completely mask the presence of a recessive allele

Law of Independent Assortment

describes the random nature of separation of homologous chromosomes during meiosis

zygote

the fertilized egg stage in a life cycle

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