Crossing over is __________.View Available Hint(s)for Part Athe formation of tetradsan independent assortment of chromosomesthe exchange of corresponding portions of homologous chromosomesthe movement of genetic material from one chromosome to a nonhomologous chromosome
Question
Crossing over is __________.View Available Hint(s)for Part Athe formation of tetradsan independent assortment of chromosomesthe exchange of corresponding portions of homologous chromosomesthe movement of genetic material from one chromosome to a nonhomologous chromosome
Solution
Crossing over is the exchange of corresponding portions of homologous chromosomes.
Here's a step-by-step explanation:
-
During meiosis, homologous chromosomes (one from each parent) pair up in a process called synapsis.
-
These pairs of homologous chromosomes form a structure called a tetrad.
-
While in the tetrad, the chromosomes can exchange segments of their genetic material in a process called crossing over.
-
This exchange of genetic material allows for the recombination of genes, which increases genetic diversity in the offspring.
-
The chromosomes then separate and are distributed to different cells during the process of meiosis.
So, crossing over is not the formation of tetrads, an independent assortment of chromosomes, or the movement of genetic material from one chromosome to a nonhomologous chromosome. It is specifically the exchange of corresponding portions of homologous chromosomes.
Similar Questions
What is crossing over?Group of answer choicesthe movement of genetic material from one chromosome to a nonhomologous chromosomemaking an RNA copy of a DNA strandthe exchange of homologous portions of nonsister chromatidsalso referred to as the “independent assortment of chromosomes”the exchange of homologous portions of sister chromatidsa direct consequence of the separation of sister chromatids
Which of the following processes occurs when homologous chromosomes cross over?Group of answer choicesTwo sister chromatids exchange identical pieces of DNA.Two sister chromatids get tangled, resulting in one re-sequencing its DNA.Corresponding segments of sister chromatids are exchanged.Corresponding segments of nonsister chromatids are exchanged.Maternal alleles are “corrected” to be like paternal alleles and vice versa.Next
Crossing over occurs between homologous chromosomes.Group of answer choicesmeiosis onlyneither mitosis nor meiosismitosis onlyboth mitosis and meiosisNext
Crossing over is the process in whichMultiple choice question.homologous chromosomes align randomly along the metaphase plate.sister chromatids are separated to opposite poles of the cell.sister chromatids align singly along the metaphase plate.homologous chromosomes physically exchange pieces.
Which statement describes crossing over as it occurs in meiosis?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.