Basic Aspects of Genetics - Essay Example

Some genes may have more than two allelic forms, but not all have multiple alleles. For example, completely dominant alleles are possessed in sickle cell anaemia victims, whereas the partially dominant alleles are possessed in victims who are carriers (Cecie and Cecie 65). A number of long-neck mice died during embryonic development.

The recessive alleles in mice result in abnormally long necks and sometimes death. Pure breeding normal mice – LL. Cross between the pure-breeding long mice and pure-breeding long necks gives out an F1 progeny of heterozygous Ll, who all had normal channels. The ratio of normal F2 progeny with abnormal long-neck F2 progeny is 3:1.

Therefore, mice with standard necks are ¾ of the F2 generation. Mice with abnormal channels are ¼ of the F1 age. Alleles in the female honeybee do not follow Mendel’s Law of Segregation. (true/false). True, since the male bee is haploid and contributes only half of the genes that the female produces. In Mendel’s law, both the male and the female gametes are supposed to contribute equal amounts of genes (Cecie and Cecie 67).

The couple will have ten children, three that are normal for both traits, three that have iron overload but normal blood calcium and four that exhibit both iron overload and hypercalcemia. The probability of the parents getting ten children were three that are normal for both traits, three that have iron overload but normal blood calcium and four that exhibit both iron overload and hypercalcemia.