A man with type A blood and a woman with type B blood have a child with type O blood. What are the genotypes of the man and woman?
A. IAi and ii
B. IAi and IBi
C. ii and IBi
D. IAIA and IBIB
E. both are ii
B. IAi and IBi
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Target cells for steroid hormones and thyroid hormones do not have membrane receptors for these hormones because
they ____.
a. stimulate the cell by changes in electrical activity b. are hydrophobic c. enter the cell by ion channels d. are small enough to diffuse directly into the cell e. dissolve readily in the extracellular fluid (ECF)
The phenomenon that occurs when two alleles of the same gene are expressed equally in a heterozygote is called
A. incomplete dominance. B. polygenic inheritance. C. codominance. D. dihybrid
In a particular species, the composition of chromosomes remains relatively_____
Fill in the blank(s) with the appropriate word(s).
If a plant could not get enough phosphorus, then it could not make ________
A) carbohydrates B) ATP C) fat D) vitamin A