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17 Cards in this Set
- Front
- Back
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2 alleles
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individuals have 2 alternate forms of a gene for each trait in their body cells
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homozygous dominant
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2 dominant allels GG
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homozygous recessive
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2 recessive allels gg
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heterozygous
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1 dominant and one recessive allele Gg
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genotype
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refers to an individuals genes
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phenotype
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refers to an individuals appearance
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monohybrid cross
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reproduction between 2 heterozygous individuals Aa results in both recessive and dominant phenotypes among offspring 3:1
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law of segregation
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each organism contains 2 alleles for each trait, and the alles segregate during the formation of gametes. Each gamete then contains only one allele for each trait. When fertilization occurs, the new organism has two alleles for each trait, one from each parent.
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Scientific name for the fruit fly
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Drosophilia melanogaster
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Life cycle of the fruit fly
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egg
first instar larvae 2nd instar larvae 3rd instar larvae Pupa adult |
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eggs hatch after how many days
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1-2
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larve feed and grow for how many days
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8 depending on the temp
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During the larve stage they molt how many times
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2
results in 3 periods called instars |
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pupation
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last 4 days
tissues reorganized to form those of the adult |
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Males vs Females
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M- smaller
more rounded abdomen black tipped |
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Autosomes
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all but one pair of chromosomes are the same in male and females because they do not actively determine sex
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Sex chromosomes
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the pair that is different
Females XX Males XY |
