Dihybrid Cross Practice Problems

Directions: Complete the following Dihybrid Cross problems. Identify the gametes from each parent. Complete a Punnett Square for the cross Identify the genotypes and phenotypes for the potential offspring. Find the phenotypic ratio for the potential offspring. Betta (Chinese/ Siamese fighting fish) Characteristics [Upper Case= Dominant & Lower Case= Recessive] B= Blue Tail                                                         b= black…

Titration Lab: NaOH with Standardized solution of KHP

Aim To standardize a sodium hydroxide (NaOH) solution against a primary standard acid [Potassium Hydrogen Phthalate (KHP)] using phenolphthalein as indicator. Variables Independent variables Mass of KHP (mKHP) Volume of KHP solution Dependent variables Volume of NaOH added [since the colour change will not happen at exactly the same volume of NaOH added (VNaOH)] Controlled…

Global Warming, Sea Level Rise and Bangladesh

The global average air and ocean temperatures have been gradually increasing from 1880-2010 (Fig.1) This increase in temperature melted a massive amount of ice and snow globally which ultimately, caused the global average sea level to also rise (Fig.2). The Earth’s average surface temperature rose by 0.74 ± 0.18°C over the period 1906–2005.  Global average…