Unit 4 day 2
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Unit 4, Day 2. Genetics & Human Development Thu, Jan 17 th (Block, 115 Min) Fri, Jan 18 th (Block, 100 Min). Homework Due Today (0 min) - Stamp. Mendelian Genetics YouTube Video Notes & Problems (35.F). Daily Question (35.A) – 5 min.

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Unit 4, Day 2

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Unit 4 day 2

Unit 4, Day 2

Genetics & Human Development

Thu, Jan 17th (Block, 115 Min)

Fri, Jan 18th (Block, 100 Min)


Homework due today 0 min stamp

Homework Due Today (0 min) - Stamp

  • Mendelian Genetics YouTube Video Notes & Problems (35.F)


Daily question 35 a 5 min

Daily Question (35.A) – 5 min

  • Describe what your ideal child would look like and what they would be good at (or what they would care about) – sports, school, environment, family, etc. Why do you want these characteristics in your child?


Essential skills and knowledge 35 a 1 min

Essential Skills and Knowledge (35.A) – 1 min

  • 2.1.D (Mendelian Genetics) I can describe the genetic basis for Mendel’s laws of segregation and independent assortment.

  • 2.1.E (Punnett Squares) I can utilize Mendelian genetics to create and analyze monohybrid and dihybrid Punnett squares.

  • 2.1.F (Phenotype and Genotype) I can predict the probably outcome of phenotypes in a genetic cross from the genotypes of the parents and mode of inheritance (autosomal or X-linked, dominant or recessive).


Homework cfu 3 min

Homework CFU – 3 min

  • Question #1 – Set up a monohybrid Punnett Square and answer the following problem: In guinea pigs, short hair, “S”, is dominant to long hair, “s”. One guinea pig is “Ss” and one is “ss”.

  • What is the probability percentage of guinea pig offspring that will have short hair? Long hair?

  • What is the probability percentage that the guinea pig offspring will be homozygous dominant, heterozygous, or homozygous recessive?


Homework cfu 5 min

Homework CFU – 5 min

  • Question #2 – Set up a DIHYBRID Punnett Square and answer the following problem: In guinea pigs, black fur, “B”, is dominant to white fur, “b”, and rough fur, “R”, is dominant to smooth fur, “r”.

  • Cross a parent who is heterozygous for BOTH traits with a parent that is homozygous dominant for BOTH traits.


Investigation before explanation 6 min

Investigation Before Explanation (6 min)

  • Rock, Paper, Scissors, Lizard, Spock

  • https://www.youtube.com/watch?v=iapcKVn7DdY

  • We did Rock v. Paper in the video

  • What would happen if things got more complex?


Just as that got complex

Just as that got complex…

  • Genetics is more complex than Mendel thought

  • There are a lot of exceptions to Mendelian genetics.


Incomplete dominance 5 min

Incomplete Dominance (5 min)

Teacher Notes

Student Practice

  • Heterozygous genotype = phenotypes BLEND (dom. allele doesn’t fully inhibit)

  • Cap, letters for both alleles!

  • WW (white) snapdragon X RR (red) snapdragon. Genotypes & phenotypes of offspring?

  • Two heterozygous snapdragons are crossed. Genotypes & phenotypes of offspring?


Codominance 5 min

Codominance (5 min)

Teacher Notes

Student Practice

  • Heterozygous genotype = shows both phenotypes at the same time.

  • Use capital letters for both alleles!

  • A black cat (BB) is crossed with a tan cat (TT). Genotypes & phenotypes?

  • A tabby cat (BT) is crossed with a tan cat (TT). Genotypes & phenotypes?


Polygenic traits 5 min

Polygenic Traits (5 min)

Teacher Notes

  • Det. by 2 or more gene pairs

  • Ex: Immune system, skin color, hair, eyes, weight.

  • Bell curve.

  • Flip a coin six times. Record number of heads and tails that result at your table.

    • ______ T, _______ H

  • Class Data

    • 0 T, 6 H:

    • 1 T, 5 H:

    • 2 T, 4 H:

  • 3 T, 3 H:

  • 4 T, 2 H:

  • 5 T, 1 H:

  • 6 T, 0 H:


Multiple alleles 5 min

Multiple Alleles (5 min)

Teacher Notes

  • More than 2 alleles for one trait exist

  • Blood type

    • 4 possible phenotypes: A, B, AB, O

    • 3 alleles:

      • IA= Type A (dom)

      • IB= Type B (dom)

      • i = Type O (rec)

  • Homozygous Type A blood (IAIA) X Homozygous Type B blood (IBIB). Phenotype and genotypes of offspring? What is the result an example of?

  • Heterozygous A blood (IAi) X Heterozygous Type B blood (IBi). Phenotype and genotypes of offspring?


Karyotype

Karyotype


Sex linked genes 5 min

Sex-Linked Genes (5 min)

Teacher Notes

Student Practice

  • Female = XX

  • Male = XY

  • X-linked genes: hemophilia, red-green color blindness, etc.

  • XA or Xa

  • Child’s sex probability?

  • Female carrier of red-green color blindness (XAXa) X male non-carrier (XAY). Probability of boys/girls having it? Carriers?

  • Male with red-green color blindness (XaY) X female non-carrier (XAXA). Probability of boys/girls having it? Carriers?


Wrap up 2 min

Wrap-Up (2 min)

  • Incomplete Dominance: Traits BLEND

  • Codominance: Both phenotypes are shown

  • Polygenic Traits: 2 or more gene PAIRS

  • Multiple Alleles: More than 2 possible alleles for one trait

  • Sex-Linked Traits: On the X chromosome

    • There are Y-linked traits (ear hair), but the Y chromosome is super small and it’s biggest purpose is to turn a female into a male (all of us start as females!)


Project activity 30 min

Project Activity (30 min)

  • Creating your baby!

  • If you show the DOMINANT phenotype, assume you are HETEROZYGOUS. (Recessive = homozygous recessive)

  • For polygenic traits (skin color, hair color, eye color): choose the most accurate one for you.

  • There are some incomplete dominance traits: again, choose the most accurate one for you.


How to determine your child

How to determine your child!

  • To determine the allele you pass onto your child, flip a coin.

  • In general, Heads = dominant, Tails = recessive.

  • If you are homozygous recessive, you do not need to flip the coin (100% chance).

  • Example: XX (mom) and XY (dad)

    • Only father flips, X = tails, Y = heads

    • Mom will always pass on X allele


Examples

Examples

  • Round face (RR, Rr) and square face (rr)

    • You have a round face? Choose Rr, NOT RR

    • You have a square face? Choose rr.

    • If: Mom is Rr and Dad is rr

      • Mom flips heads  R

      • Dad doesn’t need to flip  r

  • Curly hair (CC), Wavy (Cc), Straight (cc)

    • Mom = CC, Dad = Cc

      • Mom doesn’t need to flip  C

      • Dad flips tails  c

Rr

Cc


To determine your polygenic traits

To determine YOUR polygenic traits…

Skin Color

Hair Color

  • Very dark black (AABBCC)

  • Very dark brown (AABBCc)

  • Dark brown (AABbCc)

  • Medium brown (AaBbCc)

  • Light brown (AaBbcc)

  • Light tan (Aabbcc)

  • Pale white (aabbcc)

  • Black (AABBCCDD)

  • Very dark brown (AABBCCDd)

  • Dark brown (AABBCcDd)

  • Brown (AABbCcDd)

  • Light brown (AaBbCcDd)

  • Honey blond (AaBbCcdd)

  • Blond (AaBbccdd)

  • Very light blond (Aabbccdd)

  • White (aabbccdd)


Examples1

Examples

  • Skin Color

  • Mom is dark brown (AABbCc)

    • Mom doesn’t need to flip for “a” trait  A

    • Mom flips for “b” trait  B

    • Mom flips for “c” trait  c

  • Dad is medium brown (AaBbCc)

    • Dad flips for “a” trait  a

    • Dad flips for “b” trait  B

    • Dad flips for “c” trait  c

AaBBcc

3 Capitals =

Medium Brown


Baby s name

Baby’s Name

  • Must be appropriate

  • There are several baby names that are actually illegal in our world. If need be, I can act as the legal authority.

    • Examples: Talula Does The Hula, Venerdi (Friday in Italian), Brfxxccxxmnpcccclllmmnprxvclmnckssqlbb11116, Gesher (Bridge in Norwegian), Chow Tow, Smelly Head, @, Miatt(didn’t show if boy or girl), Anus, Devil


If your partner is not in this class

If your partner is not in this class…

  • You will compile your data later. Just do your coin flips!


When you are finished

When you are finished…

  • Answer the conclusion questions on page 46!


Digital portfolio

Digital Portfolio

  • You must scan or type up this document as your justification for your child’s appearance!


Work time 30 min

Work Time (30 min)

  • Photos

  • Journal Entries


Homework

Homework

  • dp.davincischools.org/staff/blarkin

    • “Homework Spring ‘13”

    • Reproduction and Prenatal Development

    • Take notes, do questions 

    • To make your life easier, you can subscribe to my YouTube channel

  • Suggestion: begin working on child’s photos 


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