Answer and Explanation: During S phase, the DNA in a cell is replicated. Since there are normally 46 chromosomes, and this number is doubled after S phase, human cells now have 92 chromosomes.Insert context header here:Insert context explanation here......
What are gametes formed by? How many chromosomes are in each sperm? Discuss the stages of mitosis. Define homologous chromosomes in your own words. Briefly describe, in your own words, how the single cell formed at fertilization differentiates into different types of cells. ...
To solve the question regarding the number of chromosomes in a diploid cell at different phases of the cell cycle, we can follow these steps:Step 1: Understand the terms - Haploid (n): A cell with one set of ch
Packaging DNA into Chromosomes: How Do the Long Threads of DNA Fit into the Small Interphase Nucleus?Let's Consider the Following Scenarios Human cells (and cells from most other species) are so small that they can only be seen with a microscope. Yet, if you connect all the DNA molecules...
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During mitosis, many proteins dissociate from chromatin and transcription shuts down. This may favour a silent PRE but challenge an active one. Several PcG and TrxG proteins remain bound to mitotic chromatin and may 'bookmark' silent and active states. Many PcG and TrxG target genes are dynami...
When aneuploidy occurs in many chromosomes of the cell, it will result in a miscarriage, stillbirth or a baby with debilitating defects; survival is limited. However, there are some situations of aneuploidy that can be survived, such as trisomy 21. When there is an extra copy of the 21st ...
Figure 4: Adherently grown epithelial cells (MDCK) were cultured on coverslips, fixed, and nuclei stained with Hoechst 33342. Most cells showed interphase DNA staining, but some cells showed chromosome condensation and these chromosomes segregated in mitosis (asterisks). Microscopic examination was per...
The main reason why there is no detailed structural information about chromatin in interphase is that there are no direct experimental methods to investigate the structure. While light microscopes suffice to visualize full cell nuclei and total chromosomes, they are limited in spatial resolution and do...
To solve the question regarding the number of chromosomes in a cell at different phases of the cell cycle, we will follow these steps:1. Identify the Initial Chromosome Count: - We are given that the cell has 21 chro