If the gene for yellow body color (y) is an X-linked recessive and its dominant counterpart (y+)

produces wild body colors, give the phenotypes expected and their frequencies for the following four
crosses:
(a) yellow female ? wild male
(b) wild carrier female ? wild male
(c) wild carrier female ? yellow male
(d) homozygous wild female ? yellow male What will be an ideal response?


(a) yellow male, wild female
(b) 1/4 wild male, 1/4 yellow male
1/4 wild female, 1/4 wild carrier female
(c) 1/4 wild male, 1/4 yellow male
1/4 yellow female, 1/4 wild carrier female
(d) 1/2 wild carrier female, 1/2 wild male

Biology & Microbiology

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The environment in which a microbial population lives is its habitat

Indicate whether the statement is true or false.

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The number of individuals in a specified portion of habitat is the population's ____

a. distribution b. carrying capacity c. density d. size e. birth rate

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Fungi can grow under all of the following conditions except:a

concentrated salt solutions. b. an environment with a very low pH of 3. c. a dry environment. d. jelly or other sugar solutions. e. a cold, refrigerated environment.

Biology & Microbiology

Which mutant gene is responsible for resistance to HIV in some humans?

A. CCR5 B. HIV-1 group O C. HIV-group M D. SIV

Biology & Microbiology