Replication is the process where DNA molecules copies itself to form another DNA molecule during cell division. it involves several enzymes which includes DNA helicase, the enzyme that unwounds the DNA double helix. RNA primase, it is an enzyme that creates an RNA primer. DNA polymerase, it is the enzyme that matches and lays down nucleotides to form the new DNA daughter. DNA ligase joins the Okazaki fragments by catalysing the formation of phosphodiester bond.
Meiosis produces cells (germ cells or gametes) with only half the DNA, or chromosomes, as normal cells (somatic cells). This is called haploid or referred to as "n" number of chromosomes. Normal body cells have doubke that, called "2n," or diploid. For humans our n = 23, so germ cells (haploid) have only 23 chromosomes, while somatic (normal body) cells have "2n" or 46 chromosomes. It is important to only carry half the number of chromosomes or DNA (n), because it is going to combine with another half (n) when sperm meets egg during fertilization. This n + n = 2n restores the diploid number of chromosomes (DNA) in a zygote, the first cell of a future embryo, fetus, and new human being.
The DNA technology that is helping in this process is the CRISPR-Cas system.
<h3>What is the CRISPR-Cas system?</h3>
The CRISPR-Cas system is a genome editing tool that has revolutionized genetic and molecular biology.
This genome editing tool can be used to insert specific sequences of DNA into a chromosome and thus generate a new cell expressing of these genes.
In conclusion, The DNA technology referred here is CRISPR-Cas system.
Learn more about CRISPR-Cas here:
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Answer:
homeostasis
Explanation:
Responding to the environment by maintaining a stable internal environment despite changing external conditions is characteristic of living things. The maintain of stable internal environment called homeostasis. Other characteristics of living things are: the possibility to produce, one or more cells, the possibility to grow and develop...
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Answer: Abruptio<span> placentae; Placenta Previa </span>
Abruptio<span> placentae or placental abruption is the premature separation of the placenta from the uterus. Individuals having this abruption of the placenta experiences bleeding, uterine contractions, and fetal distress.</span>
Placenta Previa, on the other hand, occurs when the placenta lies low in the uterus and partially or completely <span>covers the cervical opening (cervix)</span><span>. </span>
