Which of the following is true of ovum and sperm?
A) An ovum carries a Y sex chromosome; a sperm carries an X sex chromosome.
B) An ovum carries an X sex chromosome; a sperm carries either X or Y sex chromosomes.
C) An ovum carries an X sex chromosome; a sperm carries a Y sex chromosome.
D) An ovum carries either X or Y sex chromosomes; a sperm carries an X sex chromosomes.
B
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The lack of cross-gender interaction in the middle childhood years means that
a) girls and boys may not learn to like each other and have difficulty making cross-gender friendships. b) boys' and girls' friendships are restricted to members of their own sex. c) girls and boys do not have enough time or opportunity to learn about each other's differences and/or similarities. d) it is more difficult for boys and girls to build social competence.
A clinical psychologist investigating a new therapy technique randomly assigns participants to receive Therapy A, Therapy B, Therapy A and B combined, or no therapy. The researcher is utilizing which design?
a) Multiple-group design with independent sample b) Multiple-group design with correlated samples c) Two-group design with independent samples d) Two-group design with correlated samples