Answer:
Crossing over
Explanation:
Crossing over is the process during which two chromatids of two homologous chromosomes exchange part of their genetic segments. It occurs during the pachytene stage of prophase I of meiosis I.
Linked genes are mostly inherited together and do not exhibit independent assortment. However, when linked genes are present far apart from each other on the same chromosome, crossing over can occur between them to produce recombinant chromatids. Therefore, crossing over can break the linkage and produce recombinant progeny as it occurs during the independent assortment of unlinked genes.
Although now it causes more harm than good because it doesn't really have a purpose, it is believed it once was used for humans to digest bone.
Answer:
3. Anatomy.
Explanation:
Anatomy is a branch of science which studies the physical structure of humans, animals, and other living beings. Anatomy is a part of biological studies. This field in the science is focussed on the shape, structure, and the relationship relevant to the living organisms.
Anatomy is further divided into two branches, namely, microscopic anatomy and macroscopic anatomy.
Therefore, the correct answer is option 3.
A) Crossing over is the mechanism of genetic variation that results from the exchange of gene segments between non-sister chomatids.
Answer:
The microtubule-organizing center found in animal cells is an identifiable structure present during all phases of the cell cycle. Specifically, it is known as the _centrosoma___.
Explanation:
The centrosome corresponds to the center from which all the structures formed by the microtubules (mitotic spindle, cilia, flagella) .
Participates in cell division, intercellular transport, cell polarity, among other functions.
