A dead flu virus cell is injected into the body which in turn makes the body recognize the cell so that when an alive flu virus cell enters the body, the body knows what the foreign cell is and can successfully defend against it.
A.Volcanoes release hot air into the atmosphere, contributing to global warming. ... Why do scientists study earthquakes to predict a volcanic eruption? A.When magma moves, it causes earthquakes. B.Earthquakes break the earth apart and cause magma to appear at the surface.
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Explanation:
<u>a. How many chromosomes does a child receive from its father?</u>
Every person receives half of their chromosomes from their father and half from their mother. For that reason, if humans have 46 chromosomes in each somatic cell, 23 of them come from the father.
<u> b. How many autosomes and how many sex chromosomes are present in each somatic cell? </u>
Each somatic cell has 46 chromosomes in total; of which 22 pairs are autosomes and 1 pair are sex chromosomes. Therefore, 44 chromosomes are autosomes and 2 chromosomes are sex chromosomes (the X and/or Y chromosomes).
<u>c. How many chromosomes are present in a human ovum? </u>
The human gametes (ovum in women and sperm cell in men) have half of a somatic cell's genetic material, so that when they combine in a zygote to create their child, they form an initial cell with 46 chromosomes in total. The ovum therefore has 23 chromosomes: 22 autosomes and 1 sex chromosome.
<u>d. How many sex chromosomes are present in a human ovum?</u>
As I mentioned in the previous question, a human ovum has 1 sex chromosome. That way, when it combines with a sperm cell, which also has 1 sex chromosome, they form a zygote with <u>a pair</u> of sex chromosomes (one that comes from the mother and one from the father).
3:1.<span> The physical appearance of the </span>offspring<span> will be 3 </span>organisms<span> that look like the </span>parents<span>: 1 individual that differs in appearance.</span>
Answer: In this case, only one genotype is possible. All offspring are Yy and have yellow seeds. In the P generation, pea plants that are true-breeding for the dominant yellow phenotype are crossed with plants with the recessive green phenotype. And their is your answer.
Explanation: