Drugs and other chemicals are examples of how environmental factors affect gene expression. These drugs can either 'activate' or 'inhibit' the expression of genes that you have. For example, taking drugs while being pregnant affects the genetic makeup of the baby inside you.
Spiders are called arachnids. So, a crazy fear of spiders is called arachnophobia.
Answer:
Tyr-stop codon-Gly-Leu-Ile (5'3' Frame)
Explanation:
Transcription is the process by which a specific fragment of DNA (i.e., a gene) is used as template to synthesize an RNA molecule, typically a messenger RNA (mRNA), which is then used as template to synthesize a protein in the ribosomes by a process called translation. During translation, each triplet of nucleotides (i.e., each codon) in the mRNA is read in order from the 5' end to the 3' end to add an amino acid to the nascent polypeptide chain. This 'genetic code' is not overlapping because each codon specifies one of 20 amino acid total possible and 3 stop codons (UAA, UAG, UGA). In this case, the second codon "TGA" in DNA or "UGA" in RNA (Uracil always replaces Adenine during transcription) is a stop codon that indicates the end of mRNA transcription.
Answer:
1: A karyotype is created and used to identify possible chromosomal defects.
Explanation:
A karyotype is the observed characteristics (number, type, shape, position etc.) of the chromosomes of an individual or species within the nucleus of the cell (mainly eukaryotic). Karyotype tests are performed to show if an individual’s chromosomes are normal or not. The chromosomes (especially those in the white blood cells) are usually isolated, stained, and examined under the microscope. This detect if there is an abnormal chromosome, an extra chromosome or an incomplete chromosome. A karyotype can be used as a scientific report because possible chromosomal defects such as Down syndrome (trisomy 21), Klinefelter syndrome, Edwards syndrome and Turner syndrome can be identified using the Karyotype tests.
Metaphase is the stage in which the "crossing over" occurs.
As we know chromosomes carry genetic information. This crossing over process happens in eukaryotic cells and occurs during the mitosis phases of cell division.
Hopefully this helped.