Homologous chromosome have gene of same character.
Homologous chromosomes are pairs of chromosomes (one from the female and one from the male), each of which contains genes which correspond to the genes on the other chromosome in the pair. For example, if a chromosome contains a gene for eye color, the corresponding chromosome will also have a gene for eye color in the same place.
The word that describes similar chromosomes, one from each parent is homologous. Each human for example has, with certain exceptions 23 chromosome pairs. Twenty two are called autosomal meaning having basically to do with the body. These pairs are homologous. The remaining are the sex chromosomes, X and Y. Homologous chromosomes have the potential to contain exactly the same genes, but nature has made sure that they don't.
Four different genetic types of gametes would be produced without crossing over. These would be AB, ab, Ab, and aB.
It results in the exchange of alleles between homologous chromosomes and produces new combination's of alleles.
The independent assortment happens in the following steps in the meiosis 1. During the Pachytene stage of prophase I of the meiosis one the genes in the homologous chromosomes mixes randomly among each other by a process called crossing over and largely responsible for the variation between the siblings. 2. Metaphase 1 : The random assortment of bivalent takes place. 3. MetaphaeII : The chromosomes move randomly to the equator
Homologous, but keep in mind that only specific pairs of chromosomes numbered on a karyotype (e.g. 1, 2, 3) can be homologous.
Homologous chromosomes have all the same genes however they may have different alleles (versions) of those genes.
Homologous chromosomes are pairs of chromosomes (one from the female and one from the male), each of which contains genes which correspond to the genes on the other chromosome in the pair. For example, if a chromosome contains a gene for eye color, the corresponding chromosome will also have a gene for eye color in the same place.
Metaphase. What's the difference? Whether it's IN homologous or NOT, they're both Metaphase..... Stupid worksheet. I hate you group 3. :(
Nondisjunction is the failure of homologous chromosomes or chromatids to segregate during mitosis or meisos with the result that one daughter cell has both of a pair of parental chromosomes or chromatids and the other has none. An example is Trisomy 21, which is also called Down's Syndrome. This person has 3 chromosome #21.Nondisjunction of genes occur during meiosis I when homologous chromosomes fail to separate or during meiosis II when there is unequal distribution of chromosomes. This leads to aneuploidy.
Shared evolutionary origin: Organs must have a common ancestral structure that has been modified over time. Similar structural organization: Homologous organs should have similar basic structure and pattern of development. Similar function: Although homologous organs may have different functions in different species, they should share a common underlying function or purpose.
1.Synapsis and crossing over in prophase I: Homologous chromosomes physically connect and exchange genetic information 2.At the metaphase plate, there are paired homologous chromosomes (tetrads), instead of individual replicated chromosomes 3.At anaphase I, it is homologous chromosomes, instead of sister chromatids, that separate
Trisomy is defined as the presence of three homologous chromosomes. For example, Down's Syndrome is caused by trisomy-21, 3 copies of chromosome 21.
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The word that describes similar chromosomes, one from each parent is homologous. Each human for example has, with certain exceptions 23 chromosome pairs. Twenty two are called autosomal meaning having basically to do with the body. These pairs are homologous. The remaining are the sex chromosomes, X and Y. Homologous chromosomes have the potential to contain exactly the same genes, but nature has made sure that they don't.
Four different genetic types of gametes would be produced without crossing over. These would be AB, ab, Ab, and aB.
Chromosomes condense into an X shape before mitosis. During prophase, the chromatin in the nucleus begins to condense and coil, forming distinct X-shaped structures known as chromosomes. This condensation allows the chromosomes to be easily moved and segregated during cell division.