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众所周知,人的血型分为A型、B型、AB型和O型四种,且子女与父母的血型之间有一定的遗传关系。笔者根据遗传学中血型遗传规律制作了一种“ABO”血型遗传演示仪”。使用时,只要用按钮输入父母的血型,便会立即显示出子女可能的血型。本机可在医用教学中对血型遗传关系进行演示,也可应用于医院或家庭,作为鉴定血型遗传的辅助手段。 该血型遗传演示仪的电路原理见附图。 图中,IC_1为八D锁存器74LS373(只用其中的四路),其输入端③、④、⑦、⑧脚分别接表示父母血型的
As we all know, human blood type is divided into A type, B type, AB type and O type four, and children and parents have a certain genetic relationship between the blood type. According to the genetics of genetics in the genetics of the “ABO” blood type genetic demonstration instrument. "When used, as long as the button to enter the parent’s blood type, it will immediately show the child’s possible blood type. The machine can be used in medical education Blood type genetic relationship demonstration can also be applied to the hospital or home, as a means of identification of blood group inheritance The circuit principle of the blood type genetic demo is shown in the attached figure, IC_1 is an eight-D latch 74LS373 Four), the input ③, ④, ⑦, ⑧ feet were connected to indicate the parent’s blood type