1. Diploid species produce gametes which have half the complement of chromosomes as their somatic cells. These haploid gamete cells have how many sets of chromosomes?
2.For a single gene with two alleles displaying typical Mendelian dominant/recessive behaviour, a heterozygous individual is crossed with another heterozygote. What is the chance for each offspring, that it will have a homozygous recessive phenotype? A) 0% B) 25% C) 50% D) 75% E) 100%
3. The following table shows Chargaffâs data that demonstrates base composition of DNA from different biological sources. Source A T G C E. coli 26.0 23.9 24.9 25.2 Yeast 31.3 32.9 18.7 17.1 Sea urchin 32.8 32.1 17.7 18.4 Rat 28.6 28.4 21.4 21.5 Human 30.3 30.3 19.5 19.9 Which of the following is NOT a general conclusion that is supported by these data? A) DNA consists of a series of four-nucleotide units, each containing all four basesâATGCâin a fixed sequence. B) The amount of adenine is always equal to the amount of thymine. C) The amount of guanine is always equal to the amount of cytosine. D) Although the ratio of A/T and G/C is the constant, relative amount of any particular base varies between species. E) (A + G) / (T + C) = 1 10.
4.Assuming there are no heteroplasmic individuals but that people from different families have different DNA, how many different mitochondrial DNAs are represented in the pedigree? A) 2 B) 4 C) 5 D) 6 E) 7
1. Diploid species produce gametes which have half the complement of chromosomes as their somatic cells. These haploid gamete cells have how many sets of chromosomes?
2.For a single gene with two alleles displaying typical Mendelian dominant/recessive behaviour, a heterozygous individual is crossed with another heterozygote. What is the chance for each offspring, that it will have a homozygous recessive phenotype? A) 0% B) 25% C) 50% D) 75% E) 100%
3. The following table shows Chargaffâs data that demonstrates base composition of DNA from different biological sources. Source A T G C E. coli 26.0 23.9 24.9 25.2 Yeast 31.3 32.9 18.7 17.1 Sea urchin 32.8 32.1 17.7 18.4 Rat 28.6 28.4 21.4 21.5 Human 30.3 30.3 19.5 19.9 Which of the following is NOT a general conclusion that is supported by these data? A) DNA consists of a series of four-nucleotide units, each containing all four basesâATGCâin a fixed sequence. B) The amount of adenine is always equal to the amount of thymine. C) The amount of guanine is always equal to the amount of cytosine. D) Although the ratio of A/T and G/C is the constant, relative amount of any particular base varies between species. E) (A + G) / (T + C) = 1 10.
4.Assuming there are no heteroplasmic individuals but that people from different families have different DNA, how many different mitochondrial DNAs are represented in the pedigree? A) 2 B) 4 C) 5 D) 6 E) 7
