One member of each homologous chromosome pair comes from each gene. 6. A cell that contains both sets of homologous chromosomes is haploid.
Where does one member of each homologous chromosome pair come from?
When a sperm and egg fuse, their genetic material combines to form one complete, diploid set of chromosomes. So, for each homologous pair of chromosomes in your genome, one of the homologues comes from your mom and the other from your dad.
Does each homologous chromosome pair separate?
Figure 3: During anaphase I, the homologous chromosomes are pulled toward opposite poles of the cell. During anaphase I, the microtubules disassemble and contract; this, in turn, separates the homologous chromosomes such that the two chromosomes in each pair are pulled toward opposite ends of the cell (Figure 3).
Does the offspring of two parents obtains a single copy of every gene from each parent?
The offspring of two parents obtains a single copy of every gene from each parent. 2. A gamete must contain one complete set of genes.
What is the main difference between Chromatin and chromosomes?
Chromatin is a complex formed by histones packaging the DNA double helix. Chromosomes are structures of proteins and nucleic acids found in the living cells and carry genetic material. Chromatin is composed of nucleosomes. Chromosomes are composed of condensed chromatin fibers.
Why is pairing up of chromosome necessary?
Pairing of homologous chromosomes is an essential feature of meiosis, acting to promote high levels of recombination and to ensure segregation of homologs.
What is the same in all parts of homologous chromosomes?
Homologous chromosomes are similiar but not identical. Each carries the same genes in the same order, but the alleles for each trait may not be the same. … The maternal and paternal chromosomes in a homologous pair have the same genes at the same loci, but possibly different alleles.
What are the two distinct divisions of meiosis?
Meiosis is divided into two parts: meiosis I and meiosis II. In meiosis I, each chromosome in a cell is replicated to yield duplicated sister chromatides for each member of the homologous chromosomes.
What happens when two haploid gametes are combined during fertilization?
Fertilization between the haploid gametes forms a diploid zygote. … Haploid (1n) spores germinate and undergo mitosis to produce a multicellular gametophyte (1n). Specialized cells of the gametophyte undergo mitosis to produce sperm and egg cells (1n), which combine in fertilization to make a zygote (2n).