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【单选题】
胎儿体重超过多少为巨大儿A.
2000g
B.
2500g
C.
3000g
D.
3500g
E.
4000g
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举一反三
【单选题】Which statement best describes the relationship between genotype and phenotype?
A.
'Genotype' and 'phenotype' both describe the physical properties of cells and organisms, just using different words or symbols.
B.
Phenotype is entirely the consequence of a cell's genotype, which is why we now recognize the principle of 'genetic determinism.
C.
The genes found in a cell are that cell's genotype, and genes directly control a cell's phenotype.
D.
The genotype determines what proteins a cell contains, and the proteins in turn determine the cell's properties, or phenotype.
【单选题】In maternal effect, the phenotype of offspring depends on
A.
Its own genotype
B.
Mother’s genotype
C.
Father’s genotype
D.
Mother’s phenotype
【单选题】Which of the following statements regarding the Drosophila Bar phenotype is NOT true?
A.
Unequal crossing over event may give a rise to the duplication of the Bar region.
B.
The trait is inherited as a complete dominant where both homozygous and heterozygous show similar phenotype.
C.
The more Bar segment copy the fly has, the more reduced the facets in the eyes get.
D.
The Bar phenotype reflects the genetic phenomenon called gene dosage effect.
E.
The balance of gene product is critical to cell function and normal development.
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