Answer:
Polydactyly is a genetic condition where formation of extra finger or toe takes place.The extra finger or toe is called as supernumerary.
Explanation:
Polydactyly is associated with mutation in genes in their cis position Mutation in Hoxa gene also results in polydactyly.
It is associated with autosomal dominant mutation that occur in single gene.
This condition appears 1 in every 500.This is a common disorder in African black children and is more frequently found in Africans that are living in Eastern and central part.
Polydactyly is mainly affects the right toe or finger.
It is common in men.
The extra digit may be functional or not,partly formed with some bone.
b) desalination uses large amounts of energy.
c) desalination is the main process ised to provide water for crop irrigation
d) all of the above
The statement that is true about desalination is that desalination uses large amounts of energy, i.e., option b.
The process by which the dissolved mineral salts are removed from water is referred to as desalination.
The process that is applied to seawater is the most used one to obtain fresh water for human consumption or agricultural purposes.
It generally uses a large amount of energy as compared to other processes.
Thus, the correct option is b.
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B. Desalination uses large amounts of energy.
Answer: Air pressure is influenced by temperature because, as the air is warmed, the molecules start moving around more, so they bump into each other more often and create more pressure. But, air pressure also affects temperature - the more those molecules bump into each other, the more heat they generate.
Explanation:
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Answer:
Meiosis produces four genetically different haploid cells.
Gametic chromosomes have a different combination of alleles than parental chromosomes as a result of independent assortment
Explanation:
Meiosis and Mitosis are two types of cell division that occurs in living organisms. However, Mitosis produces daughter cells that are genetically identical to the parent cell while meiosis produces daughter cells that are genetically different from the parent cell. This accounts for the reason meiosis leads to genetic variation.
The production of genetically different cells by meiosis is as a result of the process of the random orientation of chromosomes during metaphase I of meiosis I. This process is called INDEPENDENT ASSORTMENT. However, crossing over occurs during prophase I of meiosis between non-sister chromatids of homologous chromosomes.
Mitosis and meiosis are processes of cell division. Mitosis results in two identical diploid cells, while meiosis creates four varied haploid cells, due to independent assortment and crossing over, which brings about genetic variation.
Both mitosis and meiosis are indeed processes of cell division that occur in living organisms. The fundamental difference between them is that mitosis produces two genetically identical diploid cells (cells with two complete sets of chromosomes), while meiosis results in four genetically varied haploid cells (cells with one complete set of chromosomes).
In mitosis, the division of the nucleus takes place, with each daughter cell receiving a full complement of chromosomes identical to those of the parent cell. On the other hand, in meiosis, two divisions occur, resulting in four daughter cells with half the number of chromosomes as the parent cell. These cells are further genetically unique, for two reasons: Independent assortment where the pairs of homologous chromosomes line up at the equator of the cell in a random manner, and crossing over, a process during which homologous chromosomes exchange portions of their DNA.
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It be unreasonable to conclude that this level of UV radiation exposure is harmful to these cells because, There is no control group and we don't know how many cells would have died after 3 days with normal UV exposure.
Explanation:
The researcher in the given example shows the effect of UV radiation and its effects to the cells. He does not tell about the group that did not receive the UV radiation and their effects. A control group is very important in a research because it can be compared with the result obtained by some experiment effects. It is a group in an experiment in which the treatment is not given.
The results can be compared with the group under treatment with the group that did not undergo any treatment. Since, there is no control group in this experiment, we can not determine how many cells that were exposed to normal UV radiation died after 3 days, it would be unreasonable for getting the conclusion of how harmful UV radiation exposure to these cells.