Chargaff's rules for the pairing of nitrogen bases is  

A.  A = C and G = T.
B.  A = T and G = C.
C.  A = G and C = T.
D.  A+T = G+C.


B.  A = T and G = C.

Biology & Microbiology

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Asexual reproduction ____

a. is common in vertebrates b. involves the fusion of two sperm c. involves the fusion of two eggs d. gives rise to offspring without the fusion of gametes e. involves the fusion of a male gamete and a female gamete

Biology & Microbiology

For the calico coloration in cats, which of the

following is NOT true? a. Orange color is on one X chromosome. b. Black color is on one X chromosome. c. White is the result of another gene that blocks all pigment production. d. The color white is found on the Y chromosome. e. It does not occur in males.

Biology & Microbiology

Which of the following technologies uses electricity to sort DNA fragments based on their sizes?

A.) genetic screening B.) gel electrophoresis C.) DNA microarrays D.) genetic engineering

Biology & Microbiology

Small chromosomal duplications provide raw material for the addition of genes into a species' genome. These duplications create two or more copies of the same gene, where one or both of the genes can subsequently mutate. These genes are referred to as

A. transposable elements. B. duplicated chromosomes. C. sister chromatids. D. homologous genes. E. homologous chromosomes.

Biology & Microbiology