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A diploid horse has 66 chromosomes How many tetrads does a horse have in a meiotic cell How many chromosome combinations are possible in a horse's eggs or sperm not counting crossing over?
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∙ 15y ago
Try calling Ohio State University and Call Dr Throthall (i might be spelling that wrong but that is how you say his name DR. Throth - thall) he will be able to answer you question
Wiki User
∙ 15y ago
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Why are two genes found on the same chromosomes are not always linked forever?
Two genes found on the same chromosome are not always linked forever because of a process called genetic recombination or crossing over. During meiosis, the chromosomes undergo a process where they exchange genetic material, resulting in new combinations of genes. This process occurs during the formation of reproductive cells (sperm and eggs). Here's a step-by-step explanation: Homologous chromosomes: Each pair of chromosomes in an individual contains one chromosome from each parent. These pairs are called homologous chromosomes. Crossing over: During meiosis, homologous chromosomes pair up and exchange segments of genetic material in a process called crossing over. This results in the mixing and swapping of genes between the chromosomes. Independent assortment: In addition to crossing over, during meiosis, the homologous chromosomes segregate independently into separate cells. This means that the combination of genes from each parent chromosome can vary in the resulting cells. Recombinant chromosomes: As a result of crossing over and independent assortment, new combinations of genes are formed on the chromosomes. These new combinations are called recombinant chromosomes. The occurrence of crossing over and independent assortment allows for the shuffling of genetic material between chromosomes, leading to genetic diversity and the creation of new combinations of genes. As a result, two genes found on the same chromosome can become separated and inherited independently from each other in subsequent generations. It's important to note that the likelihood of two genes being separated by crossing over depends on the distance between them on the chromosome. Genes that are closer together on the chromosome are more likely to stay linked and be inherited together, while genes that are farther apart have a higher chance of being separated by crossing over. In summary, two genes found on the same chromosome are not always linked forever because of genetic recombination during meiosis, which allows for the shuffling and independent inheritance of genes. This process contributes to genetic diversity and the creation of new gene combinations in populations.
How can crossing-over between two alleles be used to map their locations on chromosomes?
Crossing over during meiosis sometimes separates genes that had been on the same chromosome onto homologous chromosomes. Cross over events occasionally separate and exchange linked genes and produce new combinations of alleles... - Angelica Smith
Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by?
crossing over of homologous chromosomes during meiosis
Propose how crossing-over during meiosis might affect the segregation of genes that are on the same chromosomes?
Segregation is the separating of genes into different cells during meiosis. We have found that there are many more genes that display segregation than there are chromosomes. The explaination is crossing-over - where during prophase I chromosome arms of homologous chromosomes break off and attach to each other. This allows genes on the same chromosome to segregate.
How many different genetic combinations of chromosomes can be packaged in gametes made by a diploid organism of 2n equals 6?
eight
What s random fertilization?
The random combination of chromosomes resulting from pairing up 1 of the 8.4 million possible chromosome combinations of a sperm with 1 of the 8.4 million possibly chromosome combinations of the egg (due to independent assortment of chromosomes during Meiosis. This comes out to about 70 trillion combinations, which does not even factor in the crossing over of genetic material during Meiosis.
What process results in the formation of chromosome c from chromosomes a and b?
crossing over
Which of the following creates new combinations of alleles along one chromosome?
Crossing Over
How can a child get a chromosome that is totally different from the original chromosomes of both parents?
From crossing over.
Why are two genes found on the same chromosomes are not always linked forever?
Two genes found on the same chromosome are not always linked forever because of a process called genetic recombination or crossing over. During meiosis, the chromosomes undergo a process where they exchange genetic material, resulting in new combinations of genes. This process occurs during the formation of reproductive cells (sperm and eggs). Here's a step-by-step explanation: Homologous chromosomes: Each pair of chromosomes in an individual contains one chromosome from each parent. These pairs are called homologous chromosomes. Crossing over: During meiosis, homologous chromosomes pair up and exchange segments of genetic material in a process called crossing over. This results in the mixing and swapping of genes between the chromosomes. Independent assortment: In addition to crossing over, during meiosis, the homologous chromosomes segregate independently into separate cells. This means that the combination of genes from each parent chromosome can vary in the resulting cells. Recombinant chromosomes: As a result of crossing over and independent assortment, new combinations of genes are formed on the chromosomes. These new combinations are called recombinant chromosomes. The occurrence of crossing over and independent assortment allows for the shuffling of genetic material between chromosomes, leading to genetic diversity and the creation of new combinations of genes. As a result, two genes found on the same chromosome can become separated and inherited independently from each other in subsequent generations. It's important to note that the likelihood of two genes being separated by crossing over depends on the distance between them on the chromosome. Genes that are closer together on the chromosome are more likely to stay linked and be inherited together, while genes that are farther apart have a higher chance of being separated by crossing over. In summary, two genes found on the same chromosome are not always linked forever because of genetic recombination during meiosis, which allows for the shuffling and independent inheritance of genes. This process contributes to genetic diversity and the creation of new gene combinations in populations.
How can crossing-over between two alleles be used to map their locations on chromosomes?
Crossing over during meiosis sometimes separates genes that had been on the same chromosome onto homologous chromosomes. Cross over events occasionally separate and exchange linked genes and produce new combinations of alleles... - Angelica Smith
Does cytokinesis provide new genetic combinations?
Yes. Crossing over (or recombination) shuffles sequences between homologous chromosomes. The resulting chromosomes have different combinations of alleles from the original chromosomes.
Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by?
crossing over of homologous chromosomes during meiosis
Why do gametes have different combinations of alleles?
Crossing over and random alignment of chromosomes
What is the exchange of a corresponding segment between homologous chromosomes?
It would appear you are speaking of crossing over which takes place in Prophase I of meiosis.
How can new combinations of alleles be created when genes are linked?
New combinations of alleles can be created when genes are linked through a process called crossing over during meiosis. Crossing over occurs when homologous chromosomes exchange genetic material, resulting in the mixing of alleles between the two chromosomes. This process leads to the creation of new combinations of alleles and contributes to genetic variation in the population.
Why does genetic deversity result in miosis one?
In prophase I there is a phenomenon known as genetic recombination or crossing over. Similar or homologous chromosomes get together to form a structure known as a tetrad. Two chromosomes (of the four= tetra) are originally from the parental sperm and the other two chromosomes are from the maternal source. Exchanging the DNA from one chromosome to another mixes the genes on these chromosomes so that after crossing over each chromosome is a mixture of maternal and paternal genes.
