Homologous chromosomes pair up and exchange segments of DNA.
Option A
<h3><u>Explanation:</u></h3>
Crossing over is an event of Prophase 1 of meiosis 1. It occurs in the zygotene phase of prophase 1. Here the homologous chromosome pairs get very close together and gets packed within protein coat. The enzymes randomly cut the DNA segments from both chromosomes at same loci and exchange them with each other. This results in the exchange of genes between the two chromosomes. This is how the variation comes to place between offsprings of the same individuals. The crossing over results to form X shaped intersections between homologous pair of chromosomes which is called as chaismata. This phase occurs in pachytene phase and is visible in diplotene phase when the protein coat dissolves.
Answer:
The human protein coded by the human gene
Answer:
Interphase: Lowest pic, left corner.
Cell appears to be in a normal state.
Metaphase: Left, above Interphase.
Chromosomes are beginning to align in the middle of the cell. Spindles form and begin to attach to their centromeres.
Anaphase: Lowest right pic.
The chromatids are pulled away from each other and brought to different sides of the cell.
Telophase: Above Anaphase.
The genetic material is now in its respective side of the cell, which now begins to split into 2. Nucleic membrane begins to form.
Cytokinesis: Above Metaphase.
The clevage furrow is forming and separating the cytoplasm and other organelles in the cells. When done, this will result in 2 identical cells (unless it's meiosis II).
Answer: Is it mark all the apply?
A
Explanation:
You should always keep calm and try to think positive never put your self down never ever
