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Are chromosomes in a duplicated or an unduplicated state when crossing over occurs?
Wiki User
∙ 14y ago
It is in a duplicated state.
Wiki User
∙ 14y ago
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Why crossing over takes place?
Occurs during prophase I of meiosis (pachytene) in a process called synapsis. Crossover usually occurs when matching regions on matchingchromosomes break and then reconnect to the other chromosome. The value of crossing over is that each parent has a different daughter cell.
Is crossing over takes place in sperms before fertilization?
Crossing over occurs during fertilization. This is the mixing of alleles from each of the parents in order to make the offspring.
Does random alignment of chromosomes during Meiosis produce genetic variations?
In meiosis crossing over may occur at certain points on a chromatid. Crossing over is where variation occurs in allele combination. When a Zygote is formed alleles from mother and father cross over.. this is why you may have some features resembling your father and your mother... or grandma or grandpa... etc... There can be mutations ( messups ) in mitosis but the actual process results in no genetic variation. AP bio
Why genetic variation is still possible if self pollination occurs?
This is because during meiosis there is (mostly) genetic variation by means of crossing over, independent assortment and mutations. As two gametes are being fused, the end product will be different from the parent, because the factors mentioned above ensure this. For a bit more info: The end product might not always be different as sometimes (in a very rare case), independent assortment and mutations might not occur to the two gametes which are to be fertilised, and if the two gametes both contained chromosomes on which crossing over did not occur, and if these two gametes were to fertilise, then the product would be genetically the same as the parent plant.
How genetic information is kept constant through cell division?
when cell division occurs chromosomes segregate & also the genes present in pairs on then as the genes store genetic information it is kept constant though cell division
Are chromosomes in a duplicated or in unduplicated state when crossing over occurs?
It is in a duplicated state.
What action occurs during meiosis exchanging pieces of chromosomes between homologous chromosomes?
crossing over
When random assortment of chromosomes IN MITOSIS?
Crossing over occurs in meiosis. There is no need for crossing over in mitosis.
What occurs in meiosos but not in mitosis?
lining up of tetrads, crossing over, and separation of homologous chromosomes.
How do the chromosomes become different from eachotther in meiosis?
The chromosomes become different from each other due to crossing over which occurs during prophase I.
Why crossing over occurs?
Usually,crossing over occurs to create new species of life.In the case of chromosomes,2 non sister chromatids link up at chiasmata and crossover.Crossing over usually leads to evolution of new species.
Chromosomes exchange genetic information through the process of what?
Chromosomes exchange genetic information during a process called crossing over. This occurs during meiosis
What happens chromosomes undergo crossing-over?
During meiosis, permutation.
When does crossing over occur for oogenesis?
prophase I, exactly in pachytene the synaptonemal complex is formed between the thickened chromosomes and recombination or crossing over occurs.
True or false reassortment of chromosomes can occur during meiosis by crossing over or by independent segregation of homologous chromosomes?
Independent assortment occurs when each pair of chromosomes segregates independently?
Does crossing over produces chromosomes that carry genetic information from both homologous chromosomes?
The question is not proper. Please define more. I assume you meant whether the genetic information is transferred between homologous chromosomes. Yeah it does. When the two homologous chromosomes pair up to form bivalents, crossing over occurs between them.
Of chromosomes of cell divisions of daughter cells occurs where in the body homologus chromosomes crossing over for mitosis and meiosis?
The homologus chromosomes form a four, quad, and in telephase the 'homologus' chromosomes separate in half. Then, they separate and make 2 diploid cells.
