Mrs. Smith and Mrs. Jones had baby girls the same day in the same hospital. Mrs. Smith named her baby Selena and Mrs. Jones named her baby Jessica. Mrs. Jones began to suspect however that the babies had been switched. (This was in the day before DNA tests were possible.) Blood tests were done with the following results: Mr. Smith type A Mr. Jones type A Mrs. Smith type B Mrs. Jones type A Selena type O Jessica type B Had a mix-up occurred? How do you know?
Mrs. Smith and Mrs. Jones had baby girls the same day in the same hospital. Mrs. Smith named her baby Selena and Mrs. Jones named her baby Jessica. Mrs. Jones began to suspect however that the babies had been switched. (This was in the day before DNA tests were possible.) Blood tests were done with the following results:
Mr. Smith type A
Mr. Jones type A
Mrs. Smith type B
Mrs. Jones type A
Selena type O
Jessica type B
Had a mix-up occurred? How do you know?
Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden pea plants. Mendel presented his work in a paper entitled “Experiments in plant hybridization” at the meeting of the natural history society of Brunn. Mendel gave various postulates regarding the inheritance of characters and these postulates later became the law of Mendel. The three laws given by Mendel are the law of dominance, the law of segregation, and the law of independent assortment.
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