Experiments involving nuclear transplantation in amphibians indicate that nuclei derived from blastula are more likely to support development of complete and normal adults compared with those derived from later stages of development
What do these experiments tell us about the process of development?
Development occurs as a series of cascades, with early genes influencing late genes, at times with stability. Such progressive determination, if stable, may be irreversible and fail to support development of an entire organism from a single cell. A number of epigenetic factors such as chromatin remodeling and DNA methylation are also likely to come into play.
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Usually, the first procedure a genetic counselor performs for a client is _____
a. amniocentesis b. construction of a karyotype c. biochemical testing d. construction of a pedigree based on family and medical histories e. ultrasonic imaging
During incubation and convalescence a person may still spread infectious organisms
Indicate whether this statement is true or false.
VNTR analysis involves ________
A) cutting DNA with restriction enzyme and analyzing the banding pattern of fragments B) PCR amplification of specific genes C) analyzing specific loci for 2 base repeating units usually less than 100 bp in size D) analyzing specific loci for 2 to 4 bp repeating units E) None of these choices
Refer to Figure 29-2. The structure labeled 11 is:
a. a zygote.
b. a gamete.
c. a sporangium.
d. a zoosporangium.
e. a zoospore