Kahoot

Meiosis and Genetic Variation

  • Meiosis involves a cell dividing twice.
  • Crossing-over during meiosis increases genetic diversity by exchanging genetic material between chromosomes.
  • Meiosis starts with 16 chromosomes and results in cells with 8.
  • A diploid parent cell divides twice during meiosis, producing four haploid daughter cells.
  • Meiosis is necessary for sexual reproduction to maintain the correct number of chromosomes in zygotes.
  • Mitosis results in 2 diploid cells, while meiosis results in 4 haploid cells.

Genetic Principles

  • Incomplete dominance: alleles blend to create a new phenotype.
  • Random combination of sex cells during fertilization increases genetic variation.
  • Hereditary information is in genes located on chromosomes.
  • An organism's appearance is its phenotype.
  • Blood types are traits controlled by multiple alleles.
  • True breeding: offspring share the same traits as the parent.
  • Dihybrid cross led Mendel to the discovery of independent assortment.
  • Crossing the F1 generation, the recessive reappeared, showing alleles segregated into individual gametes.
  • The law of independent assortment states that traits assort independently in offspring.