Answer: In meiosis I, homologous chromosomes partitioned, whereas in meiosis II, sister chromatids isolated. Meiosis II produces 4 haploid girl cells, though Meiosis I produces 2 diploid girl cells. Hereditary recombination (crossing over) as it were happens in meiosis I.
Explanation:
Answer:
Deforestation
Explanation:
I took this quiz and got a 100.
Steroid hormone
- The cell signaling pathways induced by the steroid hormones regulate specific genes within the cell's DNA. The hormones and receptor complex act as transcription regulators by increasing or decreasing the synthesis of mRNA molecules from specific genes.
- Steroid hormones are not able to target every cell within the body, so the overall response is slower. They bind to receptors on the cell's surface and the receptors aid in helping the steroid hormones enter the cell.
- Hormones work by binding to protein receptors either inside target cells or on their plasma membranes. The binding of a steroid hormone forms a hormone-receptor complex that affects gene expression in the nucleus of the target cell.
- Steroids pass into a cell's nucleus, bind to specific receptors and genes and trigger the cell to make proteins.
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The genes, which are part of DNA, contain the<u> genetic information</u> inherited from the parents determine the traits of an organism.
The ‘complete set of all the genes and the DNA’ is called the genome which stores the entire set of information of how an organism is structured and maintained.
The pattern of dominant and/or recessive traits and the genetic variations are determined by the allelles.
Explanation:
The genetic codes in the genes represent the particular amino acid codes and their linkages specific to particular protein. The amino acids link together to form long polypeptide chains of protein molecules.
These proteins determine various traits through various roles like:
Messenger proteins: Hormones like insulin, estrogen etc., control and coordinate various functions of the body
Pigments: Like melanin determines the color of the hair, skin, eyes.
Structural protein: Like keratin gives structure of hair, nails; myosin determines muscle structure
Antibodies: Determine the immunity of a person
Ion channel proteins, messenger proteins, structural proteins, receptor proteins etc.: Determine various physiological traits.
