Answer:
See explanation below
Explanation:
<em>Non-disjunction occur as a result of lack of separation of homologous chromosomes during meiosis. </em>
As a result, the gametes (the daughter cells formed) produced end up having extra or lesser chromosomes as compared to a normal gamete.
When a gamete with extra chromosome fertilizes a normal gamete, the resulting offspring will have an extra chromosome (trisomy condition).
On the other hand, when a gamete with one less chromosome than normal fertilizes a normal gamete, the resulting offspring will have one less chromosome than normal offspring (monosomy condition).
Assuming a chromosome with Aa gene undergoes non disjunction during meiosis, the resulting gametes either contain both A and a chromosome or contain no chromosome at all.
If Aa gamete is fertilized by a normal haploid sperm (a), the resulting zygote will have the genotype Aaa.
If a gamete with no chromosome at all fertilizes a normal haploid sperm, the resulting offspring will have the genotype a.
Answer:
Answer is E.
Explanation:
Generally, sphincter are circular or ring - shaped muscles, surrounding the natural opening in the body. They control the movement of substances by opening and closing through expansion and contraction.
There are many sphincter in the body, examples are
* Cardiac sphincter...found at the upper area or portion of the stomach.
* Pupilary sphincter..found in the iris of the eye.
* Glisson's sphincter...controlling the secretion of the gall bladder,pancrease and the liver.
Answer:
Plants and fungi share some similarities as well as some differences.
Some of the differences between plant and fungal cells are:
1) The cell wall of plants is made up of cellulose. The cell wall of fungal cells is made up of chitin.
2) The plant cells can make their own food and are autotrophic. Fungal cells are heterotrophic and take in their food for energy.
3) Organelles such as chloroplast are absent in fungal cells.
Answer:
Please see below for answer
Explanation:
As the new flock of birds arrives in the city, there will be a sudden surge in the population of these birds. Since there are no predators of the birds around in this city, the population will remain at a higher number as time passes by during the next decade or so.
Cinder cone. <span>A </span>cinder cone<span> or scoria </span>cone<span> is a steep conical hill of loose pyroclastic fragments. It is build from the layers of lava it spews.</span>
