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Male chickens carry two Z sex chromosomes, while female chickens carry one Z sex chromosome and one W sex chromosome. Located on the Z chromosome is a gene for barring. Barred feathers have black and white stripes. The barred trait is dominant to the unbarred trait. Chickens have a fleshy growth on top of the head called a comb. An autosomal trait called rose comb is dominant to a trait called single comb. An unbarred male heterozygous for the rose-comb trait is crossed with a barred female with a single comb. What proportion of the resulting progeny are expected to be barred males with single combs? Give your answer as a fraction or as a decimal to the nearest hundredth.
I'm doing past exam questions and quite a lot of old exam questions ask about the effect of cyanide on respiration - is this on the new AQA specification??
i need to be able to write the formula for each compund based on the name and ionic nomenclature as well so for instance CuSO4 and Iron(ll) oxide
Can you explain the process of changing nomenclature formulas? Also, I have a hard time understanding a lot of the polyatomic ions and the rules if the suffix is -ide, -ate, or -ite.
What happens to stearic acid and paraffin wax at a molecular level and the velocity of molecules when it solidifies and melts?