The ozone layer of Earth's atmosphere helps to filter ultraviolet radiation. As the ozone layer is depleted, more ultraviolet radiation reaches Earth's surface. This increase in ultraviolet radiation may be harmful because it car directly cause O photosynthesis to stop in all marine organisms O abnormal migration patterns in waterfowl O mutations in the DNA of organisms sterility in most species of mammals and birds

Queston you have discorered a gene called "leafh," whese proteia product leoks like a fruit. You sdlak sereral verbsions of the Gene: a wild type and two mutants. Motaton 1 causes the leafy protein to not work. Mutation2 prachuce lots of extr eafy protein. Which of these represents a GOF, ae' the wild type allele. LOF, 囚 Heatygene protein Teafa geset extra leaty pretein mutaticn 3 broken reafy aca muetafin o Qene protech Colum A LOF GOF wiled type Column B a.B b. C C. A 2. 3.

8. In genetic screens of mutagenized yeast, temperature sensitive mutants defective in the secretory pathway (sec mutants) were identified. These mutants have helped scientists study the protein secretion pathway that is necessary/essential for life in eukaryotic cells. To identify sec mutants: mutagenized yeast cells were grown for 12 hours at low temperature, shifted to higher temperature for two hours, and then the population of cells were centrifuged in a density gradient. a. Mutagenized cells were first grown at the lower temperature and then shifted to the higher temperature. i. Why was the shift in temperature an important step of the experimental protocol? ii. Why would the experiment have been unsuccessful if the cells were grown exclusively at the higher temperature? b. After centrifugation, where would sec mutant cells be located compared to other cells in the population? Briefly explain why.

36. In the cell depicted in the picture, the ribosome is labeled b. c. d. 37. A gene mutation is none of these b. may orise spontaneously. a change in the nucleotide sequence of DNA. is is all of these. e. moy be caused by environmental agents. c. d. 1P BDACE

Q6.3. If mutations arise that affect shell thickness within a snail population, then with crabs present, those mutations: Will result in offspring having thicker shells than their parents O will result in offspring having thicker or thinner shells than their parents Will happen because the parents choose to give them to their offspring Will occur because crabs are present and snails need protection against predation.

5. Molecular Evidence. Cytochrome c is a protein located in the mitochondria of cells involved with cellular respiration. Compare each organism's Cytochrome CDNA sequences with the ancestor cell and each other. Circle or highlight the differences (mutations) present in the cytochrome CDNA sequences from ancestor cell. ANCESTOR CE A T TAGCGAC CAGTATATC CTACAATC C G T C TACTTCATTO ATTAGCGACCAGTT TATCCTACAATCC c GTCT ACT TCAT ATTATCG ACCAGT T TATC CTACATTCCC G TATACT TCGT EARTHWOR C T TATCGACC cGT T TAT CCTACATTCCCGT CT ACTTCG T CGTT TATCCTACTTTC C c GTC TACTTC GT CGTTTATCCTACT TTC c cGT C TACTTCG T KANGAROO CTAATC C C cc cGT T TAT C cT ACT T TCCCAT CT ACTAAGT CGT T TATCCTACTT TC C CATGTAGTAA GT GTTTATCCTACTTT CCCATCTACT A A GT АМОЕВА SPONGE CTTATC C C CTAATC c c SHARK LIZARD CTAATC C c |TTAATC DOLPHIN CAT 6. Create a Venn Diagram to show the relatedness of these organisms. Start with the trait that is shared by all the organisms on the outside. Inside each box, write the organisms that…

you find an RFLP in a gene when comparing sequences of two different people, does that mean that the gene is disrupted in one person? RFLP are never associated with a gene disruption Yes in the RFLP is in an exon It may be, or the RFLP may have no consequence on gene activity Yes, the gene must be disrupted in one of the people Yes, if the RFLP is in an intron

What is the coordinate for this TSS?

15 Which of the following mutations would have the potential to affect future generations of a species? AA frame shift mutation in the X chromosome of a cheek cell BA chromosomal mutation in the Y chromosome of a kidney cell CA point mutation in the first chromosome of a sperm cell DA substitution mutation in the third chromosome of a uterus cell Page 8 GO O