Dominant Recessive (R=Big eyes, r=Little eyes)  Genotypic Ratio- 2:2 (RR: 50%, Rr:%50) Phenotypic Ratio- all alike (100% big eyes) | Dihybrid Cross (T=Tall, t=Short, B=Blue, b=White) ttBb x TtBB  Genotypic Ratio- 4:4:4:4 (TtBB: 25%, TtBb: 25%, ttBB: 25%, ttBb: 25%) Phenotypic Ratio- 8:8 (Tall & Blue: 50%, Short & Blue: 50%) |
Pedigree
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Independent assortment is caused by the random alignment of chromosomes. This means that the separation of one gene on a chromosomes is not influenced by a gene on a different chromosome.
- Law of segregation was Mendel's first law. It states that during the production of gametes, the two copies of each hereditary factor segregate so that the offspring aquire one factor from each parent.
- Genotype: allele combinations in an indivdual that cause particular traits or disorders
- Phenotype: the expression or physical characteristics of a gene in traits or symptoms
- Dominant: a trait that will appear in the offspring
- Recessive: a trait that must be given by both parents in order to appear in the offspring
- Homozygous: having two identical alleles of a gene
- Heterozygous: having two different alleles of a gene
