Chorionic Villus Sampling reveals that a fetus has the karyotype 47, XX, +21. What is the diagnosis?

A) Edward syndrome

B) Turner syndrome

C) Down syndrome

D) Klinefelter syndrome


C) Down syndrome

Biology & Microbiology

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Whorl three of a flower makes up the

A. petals. B. sepals. C. female parts of a flower. D. male parts of a flower. E. stem region.

Biology & Microbiology

The first linkage study showed that ____________ genes were linked to genes related to the disorder

____________. A. color-perception; hemophilia D. ABO blood type; nail-patella syndrome B. color-perception; nail-patella syndrome E. ABO blood type; hemophilia C. ABO blood type; Down sydrome

Biology & Microbiology

Explain how genetic mutations that cause neurodegenerative disorders such as Huntington disease and Alzheimer

disease can also cause abnormal behavior. What will be an ideal response?

Biology & Microbiology

Due to a rapid change in the environment, a population of ants was reduced from one million to one thousand. What

type of genetic drift will occur in the gene pool of this population when it expands again? a. gene flow b. migration c. natural selection d. the founder effect e. a genetic bottleneck

Biology & Microbiology