Lab 5 Week 1

Formaeon of recombinant chromosomes homozygous

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Unformatted text preview: for a specific trait. + Genotype vs Phenotype n༆  Genotype: the geneEc makeup of an organism, such as Tt, where “T” represents the tall allele and “t” represents the dwarf allele. n༆  Phenotype: the physical traits of an organism or how the organism looks. + Crossover + Cell Cycle + Mendel’s Laws n༆  Law of SegregaEon n༆  n༆  Alleles for a trait separate when gametes are formed in meiosis. Independent Assortment n༆  Because allele pairs separate during the formaEon of gametes, each trait is transmiQed to the offspring indpendently of all the other traits. + Concepts Related to Mendel’s Law of SegregaEon n༆  A gene can exist in more than one form. n༆  Organisms inherit two alleles for each trait. n༆  In an individual, a trait is produced by a pair of alleles; and an individual can be either heterozygous or homozygous for a specific trait. n༆  A gamete receives just one of the pair of alleles. n༆  For each trait, offspring receive only one allele from each parent. n༆  A dominant allele will be expressed over the recessive allele in a heterozygote. n༆  Recessive alleles are only expressed when both recessive alleles are present. + Monohybrid Cross + Dihybrid Cross + How Do You Know What the Genotype is of a Dominant Phenotype? For example: Purple Flower Is the genotype PP or Pp? + Review n༆ Alleles, the different forms of genes, are located on chromosomes. n༆ Chromosomes are duplicated prior to mitoEc and meioEc cell division. n༆ A[er a chromosome is duplicated, it consists of two sister chromaEds that are idenEcal. n༆ During meiosis, homologous chromosomes are separated from each other in meioEc anaphase I. n༆ When genes are located on the same chromosome they do not independently segregate during meiosis....
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