#Question id: 3325
#Section 3: Genetics, Cellular and Molecular Biology
The frequency of the dominant red allele (R) in a population of diploid organisms is equal to the frequency of the recessive white allele (r). The frequency of red individuals assuming Hardy-Weinberg equilibrium is (express the frequency using decimal notation, not as a fraction or a percentage)
#Question id: 3591
#Section 3: Genetics, Cellular and Molecular Biology
Consider three yellow, round peas, labeled A, B, and C. Each was grown into a plant and crossed to a plant grown from a green, wrinkled pea. Exactly 100 peas issuing from each cross were sorted into phenotypic classes as follows
A: 51 yellow, round
49 green, round
B: 100 yellow, round
C: 24 yellow, round
26 yellow, wrinkled
25 green, round
25 green, wrinkled
What were the genotypes of A, B, and C respectively?
#Question id: 14248
#Section 5: Bioprocess Engineering and Process Biotechnology
A steam steriliser is used to sterilise liquid medium for
fermentation. The initial concentration of contaminating organisms is 108
per litre. For design purposes, the final acceptable level of contamination is
usually taken to be 10-3cells; this corresponds to a risk that one
batch in a thousand will remain contaminated even after the sterilisation
process is complete. For how long should 1 m3 medium be treated if
the temperature is 140⁰C ________________.
#Question id: 3592
#Section 3: Genetics, Cellular and Molecular Biology
In garden peas, tall (T) is dominant to short (t), Purple Flowers are (P) dominant to white flowers (p), Axial flowers (A) are dominant to terminal flowers (a), and yellow seeds (G) are dominant to green seeds (g). An individual from a true breeding line of tall, purple flowered, axial-flowered, yellow seeded pea plants is mated to an individual from a true breeding line of short, white flowered, terminal-flowered, green-seeded plants. The F1 are allowed to self-fertilize and produce an F2. What proportion of the F2 is expected to exhibit purple flowers and yellow seeds?
#Question id: 3788
#Section 3: Genetics, Cellular and Molecular Biology
The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?