Could two achondroplastic dwarfs have a normal child?
a. Yes
b. No
a
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In gene regulation and control, repression is defined as the:
a. internal change in the original nucleotide sequence of a gene or genes within an or-ganism's genome. b. mechanism of genetic control in which genes are induced only when the substrate to be degraded by enzymatic action is present. c. change of the bacterial genotypes through the exchange of DNA from one cell to another. d. mechanism of genetic control in which genes are not transcribed and therefore are not expressed in the presence of those target products in sufficient supply.
Answer the question using the accompanying figure. Which numbers identify structures that are found in all
prokaryotes?
a. 2 and 4 b. 3 and 4 c. 1 and 5 d. 5 and 9 e. 7 and 8
A germline mutation passes from generation to generation because it occurs during the DNA replication before
A) mitosis. B) meiosis. C) fertilization. D) RNA replication.
A pine tree is called a sporophyte because it
a. develops from a germinated spore. b. produces spores by meiosis. c. is haploid. d. undergoes fertilization. e. reproduces by both sexual and asexual means.