Homologous chromosome

small a, big B, small b will all be replicated. This will create a doubling of the DNA that existed and will later be condensed into chromosomes. After interphase, prophase I occurs; in prophase I the replicated chromosomes pair up with their homologous pairs and this creates a tetrad that is formed by the sister chromatids. The sister chromatids were the homologous chromosomes before being paired up. In reference of the last example, the replicated big A will pair up with the…

Chromatin, chromatids, and chromosomes have different transformations in terms of mitosis and meiosis. Chromatin in Meiosis and Mitosis are shown differently in Interphase. In Mitosis, the chromatin is made up of DNA and proteins. The DNA coils around the protein and that structure is called a nucleosome. Each chromatid in Mitosis is made up of many strings of the DNA and proteins (nucleosomes) to form a half X. The chromosome is made up of two of the chromatids (DNA and proteins-nucleosomes)…

division” because the homologous chromosomes, chromosomes that are identical, are separated into two different cells. These two new cells are referred to as haploid because they only contain one copy of each chromosome (1n). Meiosis I differs most from mitosis because more chromosomes are involved during this process. During Prophase I, everything that normally happens in Prophase still occurs, but in Meiosis, the homologous chromosomes must be paired up and then crossed over into one another.…

At the end of the lab, there were several different Chromaseratops offspring. It is like that because of meiosis. That process creates the cells and gives them chromosomes which become homologous pairs. From there, you can make a lot of different combinations of gametes. For this lab, there was 8 different gametes since there was 3 homologous pairs. For a human there would be way more combinations since we have 23 pairs or 46 chromosomes. Through independent assortment, you receive 2 homologous…

Genetics To Down Syndrome Genetics describes the makeup of our cells, genes, chromosomes, and phenotypes. When there is alter in a gene or a duplication of a chromosome, it can lead to a certain diseases. One of the main diseases known today from a duplication of a chromosome is Down syndrome. John Down first put a name to Down syndrome in 1866, but artifacts from Mexico and Saxon documented some cases of Down syndrome in individuals, and also some were found in paintings of the Renaissance in…

and repair of a cell, meiosis, a sexual process, creates genetic diversity through sexual reproduction. Mitosis can occur in any organism, but meiosis only occurs in humans, animals, plants, and fungi. Another difference between mitosis and meiosis is that the daughter cells produced by mitosis are genetically identical, unlike the daughter cells produced by meiosis which are genetically different. Crossing over, which is the process of the exchange of genetic material between homologous…

he two processes of nuclear division are similar as in they allow cells to divide and reproduce, but they also have many differences. Meiosis is the type of nuclear division that occurs in sexually reproducing organisms. In meiosis, the diploid number of chromosomes is reduced to the haploid number. Gametes have the haploid number, while zygotes have the diploid number. The homologous chromosomes that appear in the zygote look alike and have the same length and centromere position, but the…

identical to their mothers and have two sets of chromosomes. Mitosis produces 2 diploid cells. Both mitosis and meiosis are processes of cell division. They have the same steps for cell division, prophase, metaphase, anaphase, and telophase. The stages of which are interphase, prophase, metaphase, anaphase, and telophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope breaks down. The centrioles near the nucleus begin to separate and move to opposite poles of…

that occurs in sexually reproductive organisms that leads to the production of reproductive cells called gametes. The process of meiosis begins with a diploid (2n) cell, which has a full amount of chromosomes. For example, in humans, the diploid number is 46. Meiosis gives the end product of four haploid (n) gametes, which have half of the amount of DNA that their parent cells have. In humans, this haploid number is 23. The process of meiosis has many steps through which this transformation…

ABSTRACT: The purpose of this lab is to describe possible genotypes of corn and plants in procedure 17.2, and find their color and height ratio; in procedure 17.3 codominance will be observed in human blood, and the blood types of unknown samples will be determined. In procedure 17.4, Rh positive and Rh negative will be tested for in blood samples. A unit of heredity on a chromosome is called a gene. Mendel’s particulate theory states that offspring have characteristics inherited from their…