Explain why Duchenne muscular dystrophy (DMD), a recessive condition, most commonly occurs in boys. What will be an ideal response?


ANSWER: DMD is caused by mutations in the X-linked gene dystrophin. Since males have only one X
chromosome, they will express the recessive traits when only one defective, recessive allele
is present.

Biology & Microbiology

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Salt marshes differ from estuaries in that the freshwater input in salt marshes is from a single source.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Plants are able to generate all of the substances they need for their metabolism using energy from the ____

a. soil b. air c. root d. Sun e. rain

Biology & Microbiology

Which type of plants are best adapted to hot, dry conditions?

a. C3 b. C4 c. CAM d. C3 and CAM e. C4 and CAM

Biology & Microbiology

Foreign species that have negative effects on native species are called:a

prey species. b. non-native species. c. invasive species. d. predator species. e. endemic species

Biology & Microbiology