Gene control mechanisms may interact with ________. DNA RNA polypeptides all of the choices 1 2 3 4 5

In gene control, a promoter controls ________. DNA replication transcription of specific genes mRNA translation protein synthesis 1 2 3 4 5

transcription, translation methylation, acetylation operons, operators In DNA replication, the process of ________ blocks access to genes, and ________ make(s) genes accessible. mitosis, meiosis transcription, translation methylation, acetylation operons, operators 1 2 3 4 5

When do gene controls interact with RNA? in transcript processing in translation after translation all of the choices 1 2 3 4 5

Body cells become specialized in composition, structure, and function by the process of ________. acetylation methylation translation differentiation 1 2 3 4 5

Which of the following is true of X chromosome expression in female mammals? all genes are expressed the Y chromosome is suppressed one X chromosome is inactivated both X chromosomes are activated 1 2 3 4 5

"Mosaic" expression of X-linked genes refers to ________. patches of tissue where maternal or paternal X chromosomes are expressed blending of genes from maternal and paternal X chromosomes patches of tissue with different numbers of chromosomes random expression of somatic chromosomes 1 2 3 4 5

In female mammals, one X chromosome shuts down because females have ________. twice as many X-chromosome genes as males half as many X-chromosome genes as males half as many Y-chromosome genes as males inactive Y-chromosome genes 1 2 3 4 5

In dosage compensation, gene control of normal embryonic development shuts down ________. one X chromosome in males one X chromosome in females one Y chromosome in males one Y chromosome in females 1 2 3 4 5

In flowering plants, selective expression of ABC genes determines ________. how flowers develop methods of asexual reproduction genetic variety within a species steps in photosynthesis 1 2 3 4 5

The development of a body plan with differentiated cells is achieved by ________. repression of mRNA translation suppression of proteolytic enzymes expression of different genes in different embryonic cells ingestion of specific proteins and enzymes 1 2 3 4 5

The purpose of homeotic genes is to ________. replicate DNA transcribe DNA translate mRNA map out the basic body plan 1 2 3 4 5

Researchers can control gene expression in Drosophila by ________. adding special promoters to a gene mutating genes preventing transcription or translation all of the choices 1 2 3 4 5

"Pattern formation" describes the emergence of embryonic tissues ________. at specific times and places at birth before fertilization in the epidermis 1 2 3 4 5

when it can be fertilized Polar distribution of maternal proteins in an unfertilized egg determines ________. the sex of the embryo the future body axis the species when it can be fertilized 1 2 3 4 5

In prokaryotic cells, gene controls often respond to ________. short-term shifts in environmental conditions stable conditions DNA code RNA code 1 2 3 4 5

The function of a repressor protein is to ________. begin transcription prevent transcription begin translation prevent translation 1 2 3 4 5

transcription, translation mitosis, meiosis operators, operons In eukaryotes, genes control ________ in the nucleus, and ________ in the cytoplasm. transcription, translation mitosis, meiosis operators, operons RNA, DNA 1 2 3 4 5

In the absence of lactose, a repressor molecule prevents ________ from transcribing genes. DNA polymerase RNA polymerase lactase repressor proteins 1 2 3 4 5

What happens when a repressor protein is bound to a set of operators on a DNA molecule? genes are transcribed genes are not transcribed mRNA is translated mRNA is not translated 1 2 3 4 5