What is the role of centromeres and telomeres?
What will be an ideal response?
Centromeres are the chromosomal regions where mitotic or meiotic spindle fibers attach. They are therefore responsible for the accurate segregation of chromosomes to daughter cells during replication. Telomeres are heterochromatic regions of chromosomes that are also required for replication and stability. They are usually found at the ends of the chromosome and are associated with the nuclear envelope.
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Which brain region is most likely to contribute to the establishment of motor memory, the ability to perform complex
motor skills?
a. frontal cortex b. cerebellum c. hypothalamus d. amygdala e. brain stem
A monohybrid cross is
a) the second generation of a self-fertilized plant. b) a breeding experiment in which the parental varieties have only one trait in common. c) a breeding experiment in which the parental varieties differ in only one character. d) a triploid plant that results from breeding two very different plants. e) a breeding experiment in which the parental varieties have only one prominent trait.
A type of muscular dystrophy shows sex-linked recessive inheritance. Affected persons usually die by the age of 20. Suppose that a boy with the disease lives long enough to marry a woman heterozygous for the trait
If they have a son, what is the probability that he will have the disease? A) 0% B) 75% C) 50% D) 100% E) 25%
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells ________ prokaryotic cells.
A) have DNA, which is lacking in B) have membrane-enclosed structures called organelles, which are lacking in C) have a plasma membrane, which is lacking in