How do the events of meiosis explain the assortment of chromosomes?
The segregation of chromosomes in anaphase I of meiosis explains Mendel’s observation that each parent gives one allele for each trait at random to each offspring, regardless of whether the allele is expressed. … Physical crossing over during meiosis I rearranges heterozygous homologous chromosomes into new combinations.
How can meiosis be used to explain why linked traits do not assort independently of one another?
Homologous pairs of chromosomes line up at the metaphase plate during metaphase I of meiosis. … When genes are close together on a chromosome, the alleles on the same chromosome tend to be inherited as a unit more frequently than not. Such genes do not display independent assortment and are said to be linked.
What are the 3 events in meiosis that contribute to genetic variation?
We have seen that meiosis creates variation three ways: crossing over, mutations caused during crossing over, and independent assortment.
What is meiosis and where does it occur?
Meiosis is the process of cells splitting into four haploid cells, thus reducing the chromosome number by half in each cell. … Meiosis occurs in the sex cells, so the sperm and egg cells in the human body, to create even more of themselves.
What does it mean when two genes are linked?
When genes are close together on the same chromosome, they are said to be linked. That means the alleles, or gene versions, already together on one chromosome will be inherited as a unit more frequently than not.
What are the four stages of meiosis?
Meiosis I consists of four phases: prophase I, metaphase I, anaphase I, and telophase I.