Unit 4, Day 3Genetics & Human DevelopmentT/W, Jan 22nd-23rd

(Block, 115 Min)

Homework Due Today (0 min) - Stamp

•Reproduction and Human Development YouTube Video Notes & Problems (36.F)

•Egg

Daily Question

•If you could change sex for a week, would you do it? Do you think that it is easier to be male or female? Justify your answer using complete sentences.

Essential Skills and Knowledge• 2.2.A (Mitosis): I can describe each phase of mitosis

and how it is the process by which a cell divides in order to create two identical daughter cells.

• 2.2.B (Cell Specialization): I can describe how cells at different stages of human development specialize to a specific function by expressing only specific genes found within the DNA.

• 2.2.C (Prenatal Stages): I can describe the process by which a fertilized egg (zygote) undergoes cell division to form the blastocyst which becomes the embryo and finally results in the fetus.

Homework CFU- #11. What is the time of the

menstrual cycle in which a female is most likely to get pregnant? Why is she most likely to get pregnant at this stage?

Homework CFU- #2• Describe the pathway (or

absence) of the follicular, ovulation, and the luteal phases if an egg is not fertilized? What if an egg is fertilized?

Homework CFU- #3• What is the difference

between totipotent and pluripotent stem cells?

• Cell Specialization!!!

Homework CFU - #4

•Describe at least 5 differences between Meiosis and Mitosis. (Next Slide)

Meiosis Versus Mitosis

•Use the diagrams to help you•Use your video notes to help you•Work with your partner to fill out the

worksheet•You must know the similarities and

differences between Meiosis and Mitosis

Meiosis Phases•Interphase, G1: Growth, Before Duplication•Interphase, S: Duplication (Sister Chromatids)•Interphase, G2: After Duplication•Prophase I: Nuclear envelope disintegrates,

homologous pairs, crossing over•Metaphase I: Pairs line up at equator•Anaphase I: Chromosome pairs separate•Telophase I: Nuclear envelopes reform, 2 cells

Meiosis Phase Continued

•Prophase II: nuclear envelopes in 2 cells disintegrate

•Metaphase II: chromosomes line up at equator

•Anaphase II: sister chromatids separate•Telophase II: Nuclear envelopes reform, 4

daughter cells made (cytokinesis)

Mitosis Phases

•Interphase G1, S, G2: Same as Meiosis•Prophase: Nuclear envelope disintegrates•Metaphase: all chromosomes align at

equator•Anaphase: sister chromatids separate•Telophase: nuclear envelopes reform, 2

daughter cells made (cytokinesis)

Compare and ContrastMeiosis Mitosis

Parent cell - 2n chromosomes Parent cell - 2n chromosomes

Each daughter cell - n chromosomes

Each daughter cell - 2n chromosomes

Interphase is the same Interphase is the same

4 daughter cells produced 2 daughter cells produced

2 divisions 1 division

Its purpose is to enable organism to reproduce sexually. Gametes (sperm and egg) are haploid.

Its purpose is to allow multicellular organisms to grow and repair damaged tissue.

Hook

•http://www.youtube.com/watch?v=vCfXhJZjcYI

Contest

•On Lecture Activity Page 36.D•List all of the things that you can’t have

during pregnancy in 30 seconds

First Trimester (Months 1-3)Month 1 Month 2 Month 3

Amniotic sac (cushioning water) forms.

Brain and spinal cord well formed.

Baby full formed

Placenta develops - Transfers nutrients.

Digestive and sensory organs develop.

Nails and teeth

Primitive face. Blood circulation begins.

Fingers, toes, and eyes forming

Reproductive organs (cannot distinguish on ultrasound)

6-7 mm (grain of rice) 1 inch 3-4 inches

First Trimester

Second Trimester (Months 4-6)

•Period of growth•18-20 weeks: fetal heartbeat can be heard•Fetus can suck its thumbs and hiccup•Light kicks, hair forms, eyes open•If born, can survive with medical

intervention, but chances are low (body temp, respiratory failure, immune system)

Second Trimester

Third Trimester (Months 7-9)

•Fat accumulates for insulation•New nerve cells in brain are forming

(250,000 cells per minute)•Fetus responds to music and sound of

mother’s voice

Third Trimester

Birth DefectsCause Effect

Alcohol Mental Retardation

Cigarettes Premature, Underweight

Folic Acid Deficiency Brain and Spinal Cord problems

Cocaine Premature, Underweight, Permanent brain damage and behavioral disorders

Methamphetamine Premature birth, extreme irritability

CFU

•Rate 1-10•Mitosis and Meiosis•Embryo and Fetal Development•Reproductive Systems

About Me • Born late, 4 lbs 6 oz

(underweight)• Hinsdale Hospital (near

Chicago)• Adoption (was going to be

aborted)• Difficulty talking (ear

problems)• Rolling to Walking• Teeth• Orange carrots and sweet

potatoes• Hate diapers and clothes• Parents are married• Elementary school math

class, bullying

• Learned about sex early in life

• Doctor’s shot newspaper• Broke ankle in 6th grade• Junior high shy, outcast

table• Track and Field, Cross

Country, Tennis• Piano, trumpet, harmonica• First crush: 3rd grade• First boyfriend: 8th grade• Can’t remember first kiss• Favorite subject: Chemistry• High school memories:

retreats

Work Time Partners• Get with your partner• On Project Activity Page

36.E• Write down your

experiences• Brainstorm your child’s

experiences• Use your own

experiences!!

• Begin to write journal entries▫ 8 sentences

Child’s age/stage A struggle/success child

has A struggle/success you

have A struggle/success your

partner has Hopes and fears Realistic life

circumstances

Homework

•dp.davincischools.org/staff/blarkin•Go to “Biology Homework Spring ‘13”•Go to “Homework Due Th/F 1/24-25”

▫Human Development Take Notes Answer Questions

•Suggestion: 2nd picture per partner, birth and infancy journal entires