3rd MP Snow Day Review

My recommendation

The powerpoint is set up to help you practice your knowledge of this marking period. This is not everything! (Maybe 80% of what is expected for the test.) The “bolded slide” asks a question or states a problem followed by the answer. My recommendation is to have a piece of paper ready and write the answer then check it. Do not use your notes or textbook.

IF YOU HAVE ANY QUESTIONS , PLEASE CONTACT ME: Stephanie_doodigian@hcpss.orgComplete all the slides and follow the directions on the

last slide.

The portion of DNA that codes for a protein.

• Genes code for proteins.

• What is the relationship between genes and chromosomes.

• Chromosomes contain genes.

• Ms. Doodigian cut her hand which stimulated the process of mitosis to replaced damaged cells. What is the cell number of her new cells?

• Mitosis creates “daughter cells” that contain the SAME chromosome number. Humans have a chromosome number of 46.

•Function of the following:

•mRNA

•tRNA

•rRNA

•mRNA – messenger RNA; relays the genetic information from DNA to the ribosome.

•tRNA – transfer RNA; transports amino acids to the ribosome

•rRNA – ribosomal RNA; the RNA component of the ribosome

• Two flowers were crossed. In this species, RR results in red flowers, Rr results in pink flowers, rr results in white flowers. If each parent flower has two different alleles, each parent is…?

•Heterozygous Rr x Rr

•This is incomplete dominance.

• A cat egg cell has a chromosome number of 19. What is the chromosome number of the zygote?

• Egg cell 19 and sperm cell 19. Zygote is the result of fertilization = chromosome number 38.

• What is an allele? Give examples.

• An allele is a form of a gene. • You get 2 alleles for a trait, one from each parent. An

example would be- An allele for eye color: You have blue eyes, the dominant allele, from your mom, and you have the allele for brown eyes in your genotype. The allele for brown eyes is from your dad. A dominant allele is the allele that is shown in a person's phenotype. A recessive allele is not visible, but is in a person's genotype. Both dominant and recessive alleles can be passed to the individual's offspring.

• If a trait is sex-linked, the trait occurs more commonly in…

• MALES!• A particularly important category of genetic

linkage has to do with the X and Y sex chromosomes. These not only carry the genes that determine male and female traits but also those for some other characteristics as well. Genes that are carried by either sex chromosome are said to be sex linked.

• What is the process (or steps) of protein synthesis? Beginning with gene…

1. Gene (DNA)2. mRNA3. Protein4. Trait

• The process that separates DNA fragments is called

• Gel electrophoresis• http://learn.genetics.utah.edu/content/labs/g

el/• http://www.dnalc.org/resources/animations/g

elelectrophoresis.html• http://www.sumanasinc.com/webcontent/ani

mations/content/gelelectrophoresis.html

• What are the steps of the cell cycle? When does replication occur?

• G1• Synthesis – replication of DNA• G2• MITOSIS – cell division• Cytokinesis

http://www.cellsalive.com/cell_cycle.htm

• Mutations are transmitted to next generations if they are present in which type of cells? Sex cells or body cells?

• Sex cells. • Sex cells form gametes. The gametes fuse

together to form a new offspring. So unlike any other cell (like body cells or blood cells), sex cells only are passed on to the next generation (that is via fertilization). Only sex cell mutations are passed on to future generations.

• The process of choosing organisms with the most desirable traits to mate is known as…

• Selective breeding

http://www.pbs.org/wgbh/harvest/engineer/select.html

• If a DNA molecule is composed of 35 % cytosine, what percentage of the DNA molecule is composed of thymine?

• 15% - I will explain before the test :} BUT feel free to figure it out!

5 extra credit points if you show me on paper how you figured it out.

Explaining protein synthesis via pictures.Be able to identify the process and parts of protein synthesis.

Nucleus, DNA, Ribosome, mRNA, tRNA, Transcription, Translation

Explaining protein synthesis via pictures.Be able to identify the process and parts of protein

synthesis.

Nucleus, DNA, Ribosome, mRNA, tRNA, Transcription, Translation

Online activities you can use for Protein Synthesis

http://youtu.be/YxLdBNAxqKg

Rap IT!http://youtu.be/d1UPf7lXeO8

http://youtu.be/983lhh20rGY

Play a game!http://www.quickflashgames.com/games/protein-synthesis-race/

http://learn.genetics.utah.edu/content/begin/dna/transcribe/

http://www.zerobio.com/drag_oa/protein/quiz.htm

Extra Credit!

If you completed reviewing this powerpoint – AND please review your notes, study guide, textbook, etc.! Write me a note telling me you have completed studying for our County Assessment – PARENTS MUST SIGN in order to receive 10 extra credit points.