DNA is composed of sugar and a fosfate
Answer:
40 chromosomes, 20 chromosomes, 2 chromatids, haploid
Explanation:
Mitosis is a type of cell division that results in two identical daughter cells with the same number of chromosomes as the parent cell. The fish is a diploid with 40 chromosomes (80 chromatids), after the separation of sister chromatids during the anaphase of mitosis, each sister chromatid becomes a chromosome i.e 40 chromatids (chromosome) each moves to the opposite poles and after the cell divides (cytokinesis), each daughter cell will have 40chromosomes each.
Meiosis is a type of cell division that results in four daughter cells with each having half of the parental number of chromosomes. It involves two divisions; Meiosis I and Meiosis II
In meiosis I, homologous chromosomes lie side by side to form a structure called tetrad or bivalent consisting of 4 chromatids. During anaphase I, 20 chromosomes are pulled apart to each pole with each chromosome containing 2 chromatids. After cytokinesis in meiosis I, each of the two cells will have 20 chromosomes (40 chromatids) i.e 1 chromosome = 2 chromatids
At the end of meiosis II, which is similar to mitosis, chromatids are pulled apart and each becomes a chromosome, meaning 20 chromatids will be separated to each pole and become 20 chromosomes in each cell after cytokinesis. Since the parental organism was a diploid with 40 chromosomes, and the resulting daughter cells now have 20 chromosomes each, it shows that the chromosomal number has been reduced by half. 2n ---- n
Diploid organism produce haploid daughter cells
Cooler and even the place in which it is is going to be more humid.
<h2>Answer:</h2>
Bt corn is a genetically modified organism that contains a gene of bacteria known as Bacillus thuringiensis.
<h3>Explanation:</h3>
- Bt corn is a type of transgenic crop that contains a gene which produces a crystal-like protein which has an insecticidal effect.
- This gene is present in bacteria. This gene is transferred to the plant by the recombinant DNA technology and genetic engineering.
- This bacterium is a soil bacterium which has no side effects on humans.
- Due to use of this technology, the poisonous chemical insecticides are not used in crop production.
Lets look at the meaning of the terms discrete and continuous. We call a variable to be discrete when it takes number in the form of integers or fractions. This indicates that the variable input is countable in nature. When a variable takes any value present between two discrete numbers then it is considered a continuous variable. Example, a spoonful of sugar is a discrete variable whereas a flask full of water is a continuous variable. The amount of sugar in a spoon is countable whereas the amount of water in flask is not. The gradations present on the flask are a discrete approximate measure of the amount of water present in it.