The 'Bohr effect' in human physiology describes the shift in the oxygen dissociation curve of hemoglobin due to changes in: MCQ with Answer and Explanation

Explanation:
For an individual heterozygous at two unlinked loci (AaBb), the possible gamete combinations are AB, Ab, aB, ab, i.e., 4 types. This follows the law of independent assortment. Formula: 2^n, where n is the number of heterozygous gene pairs. Here n=2, so 2²=4. If genes are linked, recombination frequency determines the proportion.

Explanation:
During metaphase, chromosomes are maximally condensed and align at the cell equator (metaphase plate) attached to spindle fibers via kinetochores. This alignment ensures equal segregation. In prophase, chromosomes condense; anaphase, sister chromatids separate; telophase, nuclear envelope reforms. Metaphase is the best stage for studying chromosome morphology for karyotyping.

Explanation:
Histoplasmosis is a respiratory fungal infection caused by inhaling spores of Histoplasma capsulatum, often found in bird or bat droppings. It can be severe in immunocompromised.