Answer the following statements true (T) or false (F)
1. Thomas Hunt Morgan was the genetics researcher who discovered X-linked inheritance patterns by studying fruit flies.
2. Linkage maps are diagrams of nitrogen base sequences on DNA.
3. X-linked recessive disorders affect more females than males.
4. A male expresses an X-linked recessive disorder only if he inherits alleles conferring the disorder from both parents.
5. Variants or alternate forms of a gene are called alleles.
1.TRUE
2.FALSE
3.FALSE
4.FALSE
5.TRUE
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Olfactory neurons first transmit their action potential to the central nervous system structure called the
A. cerebellum. B. amygdala. C. accessory olfactory bulb. D. olfactory bulb. E. cerebral cortex.
Members of which fungal phylum are also called club fungi?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Which pigment(s) is/are characteristic of chlorophytes?
a. chlorophyll a b. phycobilins c. chlorophyll b d. fucoxanthin e. chlorophylls a and b
All female mammals have one active X chromosome per cell instead of two. What causes this?
A) activation of the XIST gene on the X chromosome that will become the Barr body B) activation of the BARR gene on one X chromosome, which then becomes inactive C) inactivation of the XIST gene on the X chromosome derived from the male parent D) attachment of methyl (CH3 ) groups to the X chromosome that will remain active