Possessing two identical alleles for a particular trait.
What will be an ideal response?
homozygous
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A red blood cell may burst when placed in
which of the following kinds of solutions?
a. hypertonic b. hypotonic c. isotonic d. any of these e. none of these
Growth __________, but development __________
a. is qualitative; is quantitative b. is measured by increased cell numbers; is measured by increased cell specialization c. occurs only in infants; occurs only in adolescents d. continues throughout life; stops at puberty e. is objective; is subjective
Which of the following correctly represents the probability that a detrimental autosomal recessive
allele will actually be expressed in a population if the occurrence of the allele is such that 1 in 50 individuals are heterozygous? a. 1/50 ? 1/50 = 1/2500, with 1/4 of their children homozygous recessive = 1/2500 ? 1/4 = 1/10,000. b. 1/50 ? 1/4 that are homozygous recessive = 1/200. c. 1/50 ? 2 children (on average) ? 1/4 that are homozygous recessive = 1/100. d. 1/50 ? 2 parents ? 4 children ? 1/4 that are homozygous recessive = 1/25. e. Cannot be determined from the information given.
Three investigators–Nüsslein-Volhard, Wieschaus, and Lewis–won the Nobel Prize for physiology and medicine in 1995 for work they did in 1970 with Drosophila. Briefly describe their findings
What will be an ideal response?