The structure formed by synapsed homologous chromosomes during prophase of meiosis I. also known as tetrad.
The production of gamete (eggs or sperm)
The first cell division of meiosis, in which synapsis and crossing over occur and homologous chromosomes are separated from each other, producing daughter cells with half as many chromosomes (each composed of two sister chromatids) as the parent cell.
The state of having only one copy of a particular type of chromosome in an otherwise diploid cell.
Homologous Chromosomes or Homologs
Chromosomes that are similar in size, shape, and gene content.
The plane along which chromosomes line up in the middle of the cell during metaphase of mitosis or of meiosis.
chromosomes inherited from the father
chromosomes that differ in shape or in number in a particular gender.
complete number of chromosome sets present. Haploid = ploidy of 1, diploid = ploidy of 2 and so on.
a change in the combination of alleles on a given chromosome, or in an individual.
an array of microtubules responsible for moving chromosomes during mitosis and meiosis. microtubules include kinetochore, polar and astral.
# of different chromosomes in a cell.
a chromosome inherited from the mother.
an individual forms offspring by forming two gametes
Second cell division of meiosis, in which sister chromatids are separated from each other. Similar to mitosis
One daughter cell receives two copies of a particular chromosome and the other daughter cell receives none
joining of two homologous chromosomes during prophase I of meiosis. Crossing over happens during this phase.
the structure formed by synapsed homologous chromosomes during prophase of meiosis I.
Section of DNA (or RNA for viruses) that encodes information for building one or more related polypeptides or functional RNA molecules along with the regulatory sequences required for its transcription.
an exchange of segments of non-sister chromatids between a pair of homologous chromosomes that occurs during meiosis I.
joining of gametes of different individuals, other than self-fertilization.
The chromatids of a particular type of chromosome (after replication) with respect to the chromatids of it's homologous chromosome. crossing over happens with non-sister chromatids
three copies one specific type of chromosome in an otherwise diploid cell
Any chromosome other than a sex chromosome
proteins that hold non-sister chromatids together during synapsis in meiosis I
the X-shaped structure formed during meiosis by crossing over between non-sister chromatids in a pair of homologous chromosomes.
an abnormal number of copies of a certain chromosome.