Answer:
Prophase 1
Explanation:
Prophase I :It can be divided into five stages:
1)Leplotene: In this stage, chromosome becomes visible and shorten as a single structure.
2)Zygotene: Homologous / sister chromosome pair up. This process is known as synapse. Synapse is the process of attachment of homologous /sister chromosome. One pair comes from the male parent while the other comes from the female parent.
3)Pachytene: Bivalents shorten.
4)Diplotene:Point of attachment of non-sister chromatids. The two chromosomes are seen to be joined at several points along their length. These points are known as Chiasmata.(Chiasmata, a cross). The paternal gene A, B, C may swap for the maternal gene a, b, c for instance, leading to a new gene combination in the resulting chromatids. This is referred to as *CROSSING OVER*.
5)Diakenesis: Homologous centromere move apart.
So, crossing over occurs in *Prophase 1.
The human sperm and eggs contain 23 chromosomes. The type of cell division that produces gametes with half the normal chromosome number is called meiosis. It is used to produce cells for repair and asexual reproduction. Gametes do contain different genetic information to each other and to the parent cell.
Answer:
A RISK is the chance that someone or something could be harmed by a hazard.
Explanation:
Risk is the <u>probability of experiencing harm or an adverse side effect from exposure to a hazard</u>, may it be from the workplace, environment, or property.
Hazard is anything that may be a <u>source of possible harm or damage</u> to an individual or property.
Risks within the workplace are assessed to prevent workers from possible exposure or damage, this is called <u>Risk Assessment Control</u>. Here, the <u>likelihood of a hazard occurring is determined</u>.
An example is medication errors when the nurse/s are overworked.
<em>"Overworked nurses are 15 times (for example) more likely to commit medication errors than fully-rested nurses."</em>
The likelihood of developing such errors depends on multiple factors like:
<em>"Too much work load"</em>
<em>"Huge number of patients"</em>
<em>"Lack of manpower"</em>
Answer:
MRI = Electromagnet
Moon = Not magnetic
Compass = Permanent magnet
Answer:
Hydrotropism and gravitropism work together and are difficult to separate from one another.
