Genetics True/False (1 point each) 1) 2) 3) A cross between parents each with on

Question

Genetics True/False (1 point each) 1) 2) 3) A cross between parents each with one dominant and one recessive allele is expected to give a phenotypic ration of 3:1. The following polynucleotide sequence can represent a DNA molecule: 5' ...GAGCGAG... RNA contains a carbohydrate The 3' 4) number of nucleotides in a eukaryotic gene is three times the number of amino acids in the protein that the gene encodes. Figure 1 Multiple Choice (1 point each) 5) Figure 1 to the right represents the process of a. replication b. transcription c. translation d. cytokinesis 6) Which of the following is NOT true of alleles? 5' a. They exist at the same location on homologous chromosomes b. They are variations of a gene c. Diploid individuals always have two of the exact same alleles d. Alleles of the same gene will separate during Meiosis creating haploid gametes

Explanation / Answer

1. False.

Cross between dominant and recessive allele-

Tt x tt

50% dominant and 50% recessive

TT X tt

All dominant. Thus there is no ratio of 3:1

2. true

DNA contains bases like guanine G, adenine a, Cytosine C and thymine T.

3.false

RNA or ribonucleic acid is a polymer of nucleotides containing nitrogenous base, a phosphate group and a ribose sugar.

4. true

It is true that the number of nucleotides is 3 times the number of amino acids as one amino acid is specified by a codon consisting of 3 nucleotides.

5. The figure is showing translation i.e synthesis of proteins with the help of mRNA and ribosomes.

T t t Tt tt t Tt tt

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