As it turns out, there are many more potential gamete types than just the four shown in the diagram, even for a simple cell with with only four chromosomes. This diversity of possible gametes reflects two factors: crossing over and the random orientation of homologue pairs during metaphase of meiosis I. Crossing over.
What are two ways that meiosis creates genetic diversity?
Genetic variation is increased by meiosis
Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA.
What are the 3 events in meiosis that contribute to genetic variation?
Three mechanisms that contribute to genetic variation include the independent assortment of chromosomes, crossing over, and random fertilization. In the independent assortment of chromosomes, homologous chromosomes orient randomly at metaphase 1 of meiosis.
Why does the process that creates gametes also create genetic diversity?
Fertilization of gametes from parents happens when the gametes from two parents fuse with each other and form an embryo. This embryo then becomes a new individual. Due to the fact that genetic material comes from two different individuals, this process adds to the genetic variation in the offspring.
How do meiosis and union of gametes produce genetically variable offspring?
How do meiosis and union of gametes produce genetically variable offspring? When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other. … It results in gametes that have unique combinations of chromosomes.
How does meiosis create genetic diversity quizlet?
During prophase of meiosis I, the double-chromatid homologous pairs of chromosomes cross over with each other and often exchange chromosome segments. This recombination creates genetic diversity by allowing genes from each parent to intermix, resulting in chromosomes with a different genetic complement.
How does meiosis affect the genetic makeup of an organism?
Specifically, meiosis creates new combinations of genetic material in each of the four daughter cells. These new combinations result from the exchange of DNA between paired chromosomes. Such exchange means that the gametes produced through meiosis exhibit an amazing range of genetic variation.