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【单选题】A couple has a female child with Tay Sachs disease, and three unaffected children. Neither parent nor any of the four biological grandparents of the affected child has had this disease. The most likel...
A.
autosomal dominant
B.
autosomal recessive
C.
sex-linked recessive
D.
sex-linked dominant
E.
cannot make a reasonable guess from this information
【简答题】Human cells have twenty-three pairs of chromosomes. One member of each pair is ________________ from the female parent, and the other member comes from the male parent. Two chromosomes that carry gene...
【简答题】该生药的名称是 。
【简答题】该生药的名称是 。
【简答题】该生药的名称是 。
【单选题】In species of birds, males are the homogametic sex and females the heterogametic sex. Which of the following statements is TRUE in this system of sex determination?
A.
The gender of the offspring is determined by the female parent.
B.
Male offspring have a ZW chromosome constitution.
C.
The gender of the offspring is determined by the male parent.
D.
Female offspring have a ZZ chromosome constitution.
E.
Female and male offspring have the same chromosome constitution.
【简答题】作业:请运用所学知识评价杨必的译文。 Vanity Fair Although schoolmistresses' letters are to be trusted no more nor less than churchyard epitaphs; yet, as it sometimes happens that a person departs this life, who is real...
【简答题】该生药的名称是 。
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