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The pairing up of maternal and paternal chromosomes during meiosis happens in?
The pairing up of maternal and paternal chromosomes during meiosis happens in the prophase I stage. This pairing is called synapsis and results in the formation of a structure called a tetrad.
How can a genetic disorders as Turner syndrome occur?
Going down to the cellular level, it occurs in meiosis when chromosomes fail to separate (nondisjuction). We get a set of chromosomes from our paternal side and the other set from out maternal side. For example, one of the gamete that may have came from our maternal side contains no chromosomes , O, when it should contain that chromosome x while from our paternal side we get a gamete containing the x chromosomes. This results in a XO, a sterile female when the normal sex chromosomes are XX or XY. -or- nondisjunction
Does meiosis have variation?
During meiosis, genetic recombination of homologous chromosomes occurs. So meiosis does result in genetic variation. After prophase I, during which crossing over occurs, every chromosome will have some maternal DNA and some paternal DNA.
Recombinant chromosomes have a mix of paternal and maternal alleles due to?
crossing over during meiosis, which is when homologous chromosomes exchange genetic material. This process results in genetic recombination, leading to offspring with a combination of traits from both parents.
What two events in meiosis lead to gene shuffling?
Crossing over during prophase I and random assortment of homologous chromosomes during metaphase I are the two events in meiosis that lead to gene shuffling. Crossing over exchanges genetic material between homologous chromosomes, while random assortment results in a different combination of maternal and paternal chromosomes in each gamete.
Independent assortment in sexual reproduction?
Independent assortment in sexual reproduction refers to the random distribution of maternal and paternal chromosomes into gametes during meiosis. This results in a variety of genetic combinations in offspring, contributing to genetic diversity. Independent assortment increases the likelihood of producing individuals with unique traits.
Where can you find information about someone who has both Down syndrome as well as Klinefelter's syndrome?
Causes of Klinefelter SyndromeThe additional sex chromosomes in men with Klinefelter syndrome results from nondisjunction during meiosis and may have a paternal (50 to 60 percent) or maternal (40 to 50 percent) origin. This contrasts with Down syndrome, which is caused predominantly by maternal nondisjunction and inheritance of the extra chromosome 21 from the mother.
Is angel-man syndrome sex-linked?
No. However, if the maternal copy of chromosome 15 has a mutation on a specific gene, angelman's results. Also, getting two copies of chromosome 15 from the father results in angelman's (Paternal uniparental disomy).
When does inedependent assortment take place in meiosis?
Independent assortment occurs during meiosis I, specifically during the metaphase I stage when homologous chromosomes line up randomly along the metaphase plate. This random alignment results in different combinations of maternal and paternal chromosomes being separated into daughter cells during anaphase I, contributing to genetic diversity.
What is swapping of genetic material between homologous chromosomes?
Swapping of genetic genetic material is when two chromosomes (maternal and paternal) with the same gene sequence exchange genes, this occurs during Phrophase 1 of meiosis by a process called crossing over. Hope this helps.
When K and I- combine a(n) bond results.?
When K+ and I- combine, a(n) _________ bond results.
How many homologous chromosome alignments are possible for independent assortment during meiosis?
You start with 46 chromosomes in your body. 23 from your dad and 23 from your mom. You end with two new daughter cells with their own nuclei. I think you spelled chromosome wrong. and mitosis wrong. so, you start with 46 chromosomes in your body. 23 from your mom and 23 from your dad. Then,at the end, two new daughter cells are made. They both have their own nuclei. meiosis results in 23 mitosis results in 46
