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Mr. Hernandez
Mr. Hernandez 發問於 Science & MathematicsBiology · 5 年前

In an adult multicellular organism, which of the following statements is true about cells that make up different specialized tissues?

A. Specialized cells have lose genes that they do not use.

B. Different cell types have identical genes but only certain genes are expressed.

C. Different cell types have genes that are mixed up by crossing-over.

D. Cells depend on mutations to produce the differences among them.

Also, please explain, because I don't understand this.

2 個解答

相關度
  • John T
    Lv 5
    5 年前
    最愛解答

    B. Our DNA is the same. What differs is what parts of it are expressed, and this is what makes each cell type so unique. GENE EXPRESSION DETERMINES WHY A NOSE CELL IS A NOSE CELL AND A HEART CELL IS A HEART CELL.

    資料來源： Dr. K Street, PhD Biochemistry
  • ?
    Lv 7
    5 年前

    B. Different cell types have identical genes but only certain genes are expressed.

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