An elderly patient complains of muscle weakness and lethargy. A urine specimen reveals a Na+ concentration of 600 mmol/L and an osmolarity of 1200 mOsm/L. Additional laboratory tests provide the following information: plasma Na+ concentration = 167 mmol/L, plasma renin activity = 4 ng angiotensin I/ml/hr (normal = 1), plasma antidiuretic hormone (ADH) = 60 pg/ml (normal = 3 pg/ml), and plasma aldosterone = 15 ng/dL (normal = 6 ng/dL). Which of the following is the most likely reason for this patient’s hypernatremia?

#Question id: 29095

#Unit 8. Inheritance Biology

The following table summarizes the result of a cross between two strains of Neurospora having the alleles A and a, respectively. The table shows the different patterns of octad arrangement, and the number of ascus observed of each type;

A) According to the graph first two column are from meiosis with no crossover between locus A and_____I_______ 

B) The pattern for first these two columns represent______II_______

C) The distance between the locus A and the centromere is ___III___ map units

#Question id: 29103

#Unit 8. Inheritance Biology

Which of the following is a correct prediction about Anaphase?

#Question id: 29104

#Unit 8. Inheritance Biology

#Question id: 29105

#Unit 8. Inheritance Biology

If two set of chromosome is considered in G1 phase, then at which phase of the cell cycle, the no of chromosome as well as no of DNA cell both are doubled?

#Question id: 29106

#Unit 8. Inheritance Biology

For the proper segregation of the chromosome at anaphase-I chiasma formation take place. At which stage of the cell cycle crossing over takes place?

#Question id: 29107

#Unit 8. Inheritance Biology

Aneuploids may arise through nondisjunction, the failure of homologous chromosomes or sister chromatids to separate in meiosis. which of the following statements is correct?

a) Meiosis I non-disjunction leads to produce all gamete become aneuploidy

b) Meiosis II non-disjunction leads to produce half of gametes n+1 and n-1 while other half normal haploid

c) Either meiosis I or meiosis II non-disjunction leads to produce all aneuploidy gamete

d) Meiosis II non-disjunction leads to produce all gamete become n+1 and n-1