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26 Cards in this Set
- Front
- Back
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Heredity (definition) |
The study of how genes are inherited and traits are expressed |
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Gene (definition) |
Unit of inheritence |
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Allele (definition) |
Alternative forms of a gene (trait) EX: P gene & p gene |
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Genotype (definition) |
Genetic make up of a trait EX: PP (purple flower) & pp (white flower) |
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Dominant (definition) |
An allele that dictates the appearance of heterozygotes |
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Recessive (definition) |
An allele whose phenotype is masked in heterozygotes by the presence of a dominant allele |
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Homozygous (definition) |
· Always dominant · 2 genes same in zygote |
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Heterozygous (definition) |
2 genes different in zygote |
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Monohybrid (definition) |
A genetic cross between homozygous individuals but with different alleles for a single gene locus of interest |
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Dihybrid (definition) |
A genetic cross between individuals with different alleles for two gene loci of interest |
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Offspring is what kind of generation |
F1 |
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In a mono/dihybrid cross, what is inside the cross of the genotypes |
Zygote |
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What has 46 chromosomes |
DNA |
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Genotype codes for what? |
Phenotype |
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Charles Darwin |
· Evolution · 1859- origin of species |
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BB, Bb, bb are all____? |
Genotypes |
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Blue eyes, Brown hair and skin color are all____? |
Phenotypes |
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What do Female and Male sex chromosomes look like? |
XX- Female XY-Male |
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Know these |
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Know these |
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Sexual Reproduction (definition) |
Each parent contributes one gene for each trait |
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Asexual Reproduction (definition) |
One parent passes a duplicate of its genetic information to its offspring |
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Homologues (definition) |
Pairs of chromosomes |
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Diploid |
(2n=46) |
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Haploid |
(n=23) |
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Meiosis (definition) |
A nuclear division (karyokinesis) that occurs only in sexual tissue and results in the formation of 4 haploid (n) sex cells |
