Which of the following cell models is a correct illustration of metaphase i for a 2n = 4 cell? a. a cell model consisting of a circle containing four vertical lines stacked in two rows of two. on the left there is a medium-length blue line above a long blue line. b. on the right there is a medium-length red line above a long red line. c. a cell model consisting of a circle containing four randomly arranged pairs of lines attached at the middle including: a long blue pair, a medium-length blue pair, a medium-length red pair, and a long red pair. d. a cell model consisting of a circle containing four stacked vertical pairs of lines attached at the middle. the first pair is short with blue lines. the second pair is short with red lines. e. the third pair is medium-length with blue lines. f. the fourth pair is medium-length with red lines. g. a cell model consisting of a circle containing four vertical pairs of lines attached at the middle, stacked in two rows of two. h. on the left there is a medium-length blue pair above a long red pair. on the right there is a medium-length red pair above a long blue pair. a cell model consisting of a circle containing two stacked vertical pairs of lines attached at the middle. i. the top pair is medium-length, with a blue line on the left and a red line on the right. j. the bottom pair is long, with a blue line on the left and a red line on the right.

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Which of the following cell models is a correct illustration of metaphase i for a 2n = 4 cell? a. a cell model consisting of a circle containing four vertical lines stacked in two rows of two. on the left there is a medium-length blue line above a long blue line. b. on the right there is a medium-length red line above a long red line. c. a cell model consisting of a circle containing four randomly arranged pairs of lines attached at the middle including: a long blue pair, a medium-length blue pair, a medium-length red pair, and a long red pair. d. a cell model consisting of a circle containing four stacked vertical pairs of lines attached at the middle. the first pair is short with blue lines. the second pair is short with red lines. e. the third pair is medium-length with blue lines. f. the fourth pair is medium-length with red lines. g. a cell model consisting of a circle containing four vertical pairs of lines attached at the middle, stacked in two rows of two. h. on the left there is a medium-length blue pair above a long red pair. on the right there is a medium-length red pair above a long blue pair. a cell model consisting of a circle containing two stacked vertical pairs of lines attached at the middle. i. the top pair is medium-length, with a blue line on the left and a red line on the right. j. the bottom pair is long, with a blue line on the left and a red line on the right.

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g. A cell model consisting of a circle with four pairs of perpendicular lines connected at its center, stacked in two rows of two.

Explanation:

In Metaphase I of the cells, there are pairs of homologous chromosomes lined next to each other which are defined as synapsis. Each pair of two (bivalent) chromosomes consists of a total of four chromatids located on the metaphase plate.

Metaphase I occurs when tetrads of chromosomes are lined along the equator of the spindle. Spindle fibers are attached to the centimeter region of each pair of homologous chromosomes. These homologous chromosomes are the matching alleles derived from the mother and father.

In Metaphase I, meiotic recurrence (” crossing over ”) occurs. Metabolic recidivism means that the genetic traits of both parents are shifted. A large number of possible genetic combinations result. It is estimated that there is a 50-50 chance that the cells will acquire the homologous daughter of the mother or father for each chromosome. In an organism with 2 sets of chromosomes, there are 4 ways in which the chromosomes can be arranged. This results in differences in the chromosomal distribution in daughter cells after meiosis I.