Unit 4, Day 6 Genetics & Human Development W/R, Jan 30 th -31 st (Block, 100 min)

Homework Due Today None

Daily Question Page 39.D A heterozygous tall, red-flowered plant is crossed with a homozygous short, white- flowered plant. Determine the probability that the phenotype of the offspring will be Tall/Red, Tall/White, Short/Red, and Short/White.

Step 1 and Step 2 Step 1: How many traits are there? Will we do a monohybrid or a dihybrid Punnett square? Step 2: Which allele is dominant in each trait? (Recall that in a heterozygous genotype, you only see the dominant phenotype)

Step 3 and Step 4 Step 3: Assign letters to each trait. (ex. T for tall, t for short) Step 4: What is the four-letter genotype of the first plant? Of the second plant?

Step 5 and Step 6 Step 5: What are the gametes for the first plant? For the second plant? Place these on the outside of the square. Step 6: Do the cross. Check your answers. Remember that all offspring should have the same number of letters as the parents!

Step 7 Step 7: Find the probability of the phenotypes of the offspring. ▫Tall/Red: ▫Tall/White: ▫Short/Red: ▫Short/White:

Try #2! Two heterozygous Tall, Green pea plants are crossed. Find the probability that their offspring will be Tall/Green, Tall/White, Short/Green, Short/White. ▫Step 1: # of traits ▫Step 2: Which traits are dominant? ▫Step 3: Assign letters ▫Step 4: 4-Letter genotype of parents? ▫Step 5: Gametes of each plant? ▫Step 6: Do the cross. ▫Step 7: Find the probability for offspring.

Essential Skills and Knowledge Essential Skill #2.2 (Development): I can describe the growth stages of human development from a zygote formed at fertilization to an adult human being. ***Note: Essential Skill #2.1 (Genetics) was reviewed on Monday/Tuesday

Human Development Review Prenatal Development (Page 36.F) 1.What does the word “prenatal” mean? 2.What is the process by which one cell (zygote) becomes trillions of cells? 3.How many daughter cells does mitosis produce? 4.How many chromosomes do those daughter cells have? (n or 2n) 5.Besides growing up, what is another purpose of mitosis?

Human Development Review Mitosis (Page 36.F) 1.What is the purpose of Interphase? 2.What is one thing that occurs during Prophase? 3.What is one thing that occurs during Metaphase? 4.What is one thing that occurs during Anaphase? 5.What are two things that occur during Telophase? 6.What is the process by which two cells split apart called?

Human Development Review First days of development (36.F) 1.Describe Day 0 2.Describe Day 1 3.Describe Day 2 4.Describe Day 3 5.On Day 4, what is the mass of 32 cells called? 6.On Day 7, what is the mass of cells that is mostly hollow except for a small group of cells within called? 7.What does the blastocyst implant into? 8.What does the inner group of cells become? 9.What does the outer group of cells become?

Human Development Review Stem Cells (Page 36.F) 1.What is a totipotent stem cell? 2.What is a pluripotent stem cell?

Human Development Review First and Second Trimester (Page 36.C) 1.How large is the embryo after Month 1? 2.The _____ and ______ _____ are fully formed after Month 2? 3.In Month 3, the ________ ______ are formed but cannot be found on the ultrasound. 4.During what range of weeks can the fetal heartbeat be found on a stethoscope? 5.If a baby is born during the second trimester, what are some difficulties they will have in surviving?

Human Development Review Third Trimester and Birth Defects (Page 36.C) 1.How many new brain cells are forming per minute during the third trimester? 2.What can folic acid deficiency lead to? 3.What can mother’s use of methamphetamines lead to?

Human Development Review Birth (Page 37.F) 1.What are the three stages to birth? 2.Describe dilation. 3.Describe expulsion. 4.Describe the placental stage. 5.If complications result during birth, what surgical process will doctors do?

Human Development Review Human Development (Page 37.F) 1.During the first four weeks of life, what is the child called? 2.During infancy, what are some things that the child learns? 3.How long is the period of childhood? 4.Describe the process of puberty for boys. 5.Describe the process of puberty for girls. 6.What are some characteristics of aging during adulthood?

Project Activity Pamphlet ▫Accompanies the PSA

Announcement Due winter formal this weekend… ▫The project due date is changed to Wed/Thur, February 6 th /7 th. ▫All things should be posted on DP = 17 posts  Create a category: “Biology – Trial by Child”  One per journal entry (16 total)  Include the pictures in the correct stage for either parent’s journal entry  17 th post: the Baby Face Lab Data. ▫On Wed/Thur, you will go to another class to show your PSA and to pass out your pamphlets.