!! DNA double helix structure! double helix image! Mitosis Worksheet! Benefits and Dangers of sexual and asexual reproduction! Genetics Quiz!

Transcription

1 Reproduction Student Pages DNA double helix structure double helix image Mitosis Worksheet Benefits and Dangers of sexual and asexual reproduction Genetics Quiz

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4 Mitosis Practice Worksheet Name Date Per Complete the worksheet using the Basic Genetics website (link on the wiki) or your textbook. Part 1 Directions: Match the description with the part of the cell cycle: 1. The chromosomes line up across the middle of the cell. 2. The cell grows, matures, and eventually copies its DNA. 3. The chromatids are pulled apart, to opposite ends of the cell. 4. The chromatin forms chromosomes, nuclear membrane gone. 5. The cell membrane pinches in, dividing the cytoplasm into 2 cells. 6. A nuclear membrane forms around both sets of chromatids. A. Interphase B. Prophase C. Metaphase D. Anaphase E. Telophase F. Cytokinesis Part 2 Direcitons: Match the illustration with the part of the cell cycle: (use above letters from questions 1-6) Part 3 Directions: Using the illustration from part 2, arrange the number of illustrations 1 5 in the correct order for the process of mitosis. Write the order below. Part 4 Direcitons: Answer the following questions.

5 1. What stage do cells spend most of their lives in? 2. If a normal human cell has 46 chromosomes how many chromosomes will it s daughter cell have? 3. Do the illustrations from Part 2 show images of a plant or animal cell? 4. If Part 2 represented the OTHER type of cell what about the cells would be different?

6 Label the stages of the cell cycle & mitosis. LABEL and COLOR the stages in the plant cell and animal cell. The stages should be colored as follows --- interphase-pink, prophase-light green, metaphase-red, anaphase-light blue, and telophase-yellow. Also label the CENTRIOLES, SPINDLE FIBERS, CENTROMERE, and CHROMOSOMES.

7 Benefits and Dangers of Sexual and Asexual Reproduction Asexual Reproduction Only one parent is needed. The daughter organisms are 100% identical to the parent organism. 100% of the genetic information (DNA) gets transferred. Examples: Sea stars regenerate Bacteria: binary fission

8 Asexual Reproduction Benefits: Quick Reproduction (as fast as minutes) No need to find a mate Good genes passed on and on and on and on Dangers: Bad genes go on and on and on.

9 No genetic diversity, so organisms cannot adapt. Sexual Reproduction Two parents are needed. One to provide the sperm cell, one to provide the egg cell. The daughter organisms get half their DNA from the father (sperm cell) and half their DNA from the mother (egg cell). Sexual Reproduction Benefits: Genetic Diversity; at least some members will survive and adapt to changing environments Dangers: You need to spend time and energy to find a mate

10 Bad combinations of genes/dna can happen

11 Name Date For each item below, mark which box applies to you, your mom, and your dad to see from whom you inherited each trait. For example, if you can touch your tongue to your nose without using your fingers put a check mark next to the S for self. If your mom or dad can do that put a check mark next to M for Mom and/or D for Dad. If you are adopted you may not know the information below about your birth parents. Just mark the S spaces. This will give you an idea of some traits your birth parents may have. Touch tongue to nose Curl tongue Dimples when you smile Color of HAIR EYES S S M M D D Direction of hair growth on back of head CW or CCW* S M D Bend last joint on finger Spread fingers Spread toes Wiggle little toe Image 2009 Answers in Genesis Which traits did you inherit from your mother? * CW = clockwise CCW = counter clockwise Which traits did you inherit from your father? It might be fun to use this test with your grandparents to try to further trace where these traits came from.