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Describe and distinguish between replicated chromosomes and homologous chromosomes?
Chromosomes usually occur in pairs in body cells. One chromosome in the pair comes from one parent and the other chromosome comes from the other parent. The two chromosomes are the same size and shape and carry the same genes in the same positions. They are called homologous chromosomes.
When cells divide the chromosomes first have to copy themselves (ie replicate). Each homologous chromosome makes a replica of itself, and the original and replica are attached to each other at a region called the centromere.
What else can I help you with?
What phrase is used to describe the chromatids after crossing over takes place and the homologous chromosomes separate?
Gghjh
What phrase is used to describe the chromatids after the crossing over takes place and the homologous chromosomes separate?
Gghjh
Phrase used to describe chromatids after crossing over takes place and the homologous chromosomes separate?
After crossing over occurs and homologous chromosomes separate, the resulting chromatids are referred to as "recombinant chromatids." This process involves the exchange of genetic material between non-sister chromatids, leading to increased genetic diversity in the resulting gametes. The recombinant chromatids carry a mix of alleles from both parents, contributing to variation in offspring.
How are nondisjunction and polyploidy related?
The difference between polyploidy and nondisjunction is that being polyploidy is a result of nondisjuction. When the metaphase II doesn't occur properly the homologous pairs will stay together. Leaving one cell with out that chromosome and with with an extra. Polyploidy has one too many chromosomes.
What is the difference between Homologous chromosomes or homologues?
Homologous chromosomes are chromosome pairs of the same length, centromere position, and staining pattern, with genes for the same characteristics at corresponding loci. One homologous chromosome is inherited from the organism's mother; the other from the organism's father.[1]They pair (synapse) during meiosis, or cell division that occurs as part of the creation of gametes.Each chromosome pair contains genes for the same biological features, such as eye color, at the same locations (loci) on the chromosome. Each pair, however, can contain the same allele (both alleles for blue eyes) or different alleles (one allele for blue eyes and one allele for brown eyes) for each feature.i answered my own question... =p
What is another word for matching chromosomes?
Homologous is the word used to describe matching chromosomes, with a homolog being a pair of homologous chromosomes.
What phrase is used to describe the chromatids after the crossing over takes place and the homologous chromosomes separate?
Gghjh
What phrase is used to describe the chromatids after crossing over takes place and the homologous chromosomes separate?
Gghjh
What terms is used to describe pairs of chromosomes having DNA segments or genes for the same traits?
Hobnobs
Describe crossing over and independent assortment.?
- Crossing over is the event in which non-sister chromatids of homologous chromosomes swap or exchange DNA segments. This produces new gene combinations and only occurs in prophase 1 when tetrads form. independent assortment is the random orentation of pairs of homologous chromosomes at metaphase 1
Describe three events that occur during meiosis 1 but not during mitosis?
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
What is the difference between Chiasma and Chiasmata?
Chiasma refers to the physical site of crossover between homologous chromosomes during meiosis, facilitating genetic recombination. Chiasmata are the visible manifestations of chiasmata, appearing as X-shaped structures that hold homologous chromosomes together before they separate during meiosis.
What is the term used to describe genes that are alike?
Homologous.
Phrase used to describe chromatids after crossing over takes place and the homologous chromosomes separate?
After crossing over occurs and homologous chromosomes separate, the resulting chromatids are referred to as "recombinant chromatids." This process involves the exchange of genetic material between non-sister chromatids, leading to increased genetic diversity in the resulting gametes. The recombinant chromatids carry a mix of alleles from both parents, contributing to variation in offspring.
2 Describe what happens in Meiosis 1 Make sure you include what occurs with the chromosomes in the parent cell and the resulting daughter cells?
The replicated chromosomes, like the original cell, are pulled apart to the opposite poles, dividing the cell into two daughter cells - you still have 46 chromosomes which is why the cells undergo meiosis 2 - which are identical to one other and also to the original cell.
Describe briefly what happens to chromosomes during meiosis?
The chromosomes are first replicated during interphase. In meiosis I, the homologous chromosomes first pair (synapse) with one another. During synapses, pieces of the chromatids can be exchanged between the homologues. The homologous chromosomes are separated by the end of meiosis I. In meiosis II, the chromatids are separated from each other, four haploid daughter cells each with single stranded chromosomes are formed. If it is a male, four sperm are formed. In females, one egg and four polar bodies are formed.
List the phases of meiosis 1 and meiosis 2 and describe the events characteristic of each phase?
Interphase phase is the phase before meiosis begins, genetic material is duplicated. The first division of meiosis is prophase 1 which is duplicated chromatin condenses. Each chromosome consists of two, closely associated sister chromatids. Crossing over can occur during the latter part of this stage. Metaphase 1 is homologous chromosomes align at the equatorial plate. Anaphase 1 homologous pairs separate with sister chromatids remaining together. Telophase 1 two daughter cells are formed with each daughter containing only one chromosome of the homologous pair.
