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Bella Nat 5 Unit 2

Monohybrid Inheritance

TermDefinition
Inherited characteristic something that is passed from parents to offspring
Sexual reproduction offspring have genes from 2 parents, increases variation
Asexual reproduction offspring are clones of one parent
Variation the differences present in a species
Discrete variation differences that can be observed and fall into distinct categories
Continuous variation differences that are measured and fall over a range of values between a minimum and maximum
Polygenic something that is determined by many genes (generally causes continuous variation)
Family tree Genetic relationships between individuals in a family
Phenotype the physical appearance of a characteristic
Genotype the alleles that are present
F1 generation the first filial generation, offspring of parents
F2 generation the second filial generation, second generation down from parental
P1 generation parental generation
Predicted ratio the expected numbers of each type of offspring as worked out in the punnet square
Punnet square a method of working out what genotypes (and phenotypes) to expect from a cross
Homozygous genotype containing 2 of the same allele
Allele forms of a gene
Homozygous recessive genotype containing two copies of the recessive gene (aa)
Homozygous dominant genotype containing two copies of the dominant gene (AA)
Heterozygous genotype containing different alleles (Aa)
Dominant allele that only requires one copy to show in phenotype, shown as a capital letter
Recessive allele that requires two copies to show in phenotype, shown as a lower case letter
Diploid cell that contains 2 sets of chromosomes
Haploid cell that contains 1 set of chromosomes
Created by: nscobie
 

 



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