(this is science not biology)do population change very much, or are they in eqilibrium (stable)?

answer; a male inherits only one allele of the x-linked gene controlling hair color;

answer; /// the correct )

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.