what are the answers to these 4 questions? please explain. nswers that could rea
ID: 146282 • Letter: W
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what are the answers to these 4 questions? please explain.
nswers that could reasonably complete this sentence. DNA in the nucleus of cells in the liver and DNA in the epithelium lining of the digestive tract. O consists of genes that code for proteins; there is no DNA in the nucleus that has a regulatory function O is identical, if the liver and digestive tract are in the same individual. is identical in nucleotide sequence, but different cell types have different mutations is different; each cell type only has one or two chromosomes with genes that code for the functions of that cell type. has regions of homology (similarity), but is not identical, even if the liver and digestive tract are in the same person.Explanation / Answer
7. All the cells in a person's body have the same DNA. identical. However, the expression of the genes contained in that DNA occurs differently and that regulates the structure and function of that particular tissue/cell. Mutations are abnormal and sudden. (not commonplace). The nucleus regulates most functions of the cell and hence, it is named the brain of the cell.
Hence, all options except the second one are wrong. (identical in the same person)
8. True. We cannot be truly multicellular if our cells merely coexist together instead of interacting. Hence, cell adhesion and subsequent interaction and exchange are important.
9. Mendel's law of Segregation states that allele pairs separate or segregate during gamete formation, and randomly unite at fertilization.
second option corresponds to law of independent assortment.
states that each gamete will contain one allele for a gene. (this option is correct since alleles get segregated from two to one and then get independently assorted).
Segregation does not require genes to be on the same chromosome and remains unaffected by crossing over.
Parents make an equal contribution is not explicitly stated but since one parent gives one gamete, it is implied. (applies here)
10. There are 6 genes in consideration. for 3 of these, the snake is homozygous (same allele). Hence, at A, C and E, there can be no variation.
At B, D and F, there are 2 possibilities each. B or b, D or d and F or f.
number of different types of gametes= product of all possibilities= 2*2*2*1*1*1 = 8.
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