Crossing over is one of the most important events in meiosis because
a. it produces new combinations of alleles on chromosomes.
b. homologous chromosomes must be separated into different daughter cells.
c. the number of chromosomes allotted to each daughter cell must be halved.
d. homologous chromatids must be separated into different daughter cells.
e. it decreases genetic diversity.
a
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Two alleles of the same gene ________.
A. are always different B. can be the same or can be different C. are always the same D. originate from the same parent
Which of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme (endonuclease)?
A) AAGG TTCC B) AGTC TCAG C) GGCC CCGG D) ACCA TGGT E) AAAA TTTT
In modern terminology, Mendel's heredity "factors" are called
A. DNA. B. chromosomes. C. genes. D. RNA.
The concepts of transcription and translation have been said to form the ‘central dogma’ of molecular
biology. Is this a fitting description? What will be an ideal response?