In which gland do T cells undergo further maturation?
A) adrenal
B) thyroid
C) thymus
D) pituitary
C
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How did Bateson and Punnett's work with comb morphology in chickens differ from the dihybrid work of Mendel?
A. They were working with sex-limited traits. B. Their F2 offspring displayed 4 unique phenotypes, not the four combinations of two phenotypes expected in a Mendelian cross. C. ½ of their combinations were lethal. D. The expression of their trait varied by the environment in which the chickens were raised.
What is the key concept addressed by the question?
What will be an ideal response?
Questions about ultimate causes of behavior are ____ questions, while proximate questions about behavior are ____
questions.
a. how; why b. what; how c. how; when d. what; who e. why; how
If an X-linked disorder is lethal to the affected individual prior to the age at which one reaches reproductive maturation, the lethality will be expressed only in males. Why is this so?
What will be an ideal response?