Review ActivityThink! Think! Think!

Think! Think! Think!

A homozygous round seed crosses with a homozygous wrinkled seed. Give the genotype and the phenotype of the offspring.

Answer:

Phenotype: 100% Round Seed Genotype: 100% Heterozygous

Dominant Round Seed

Think! Think! Think!

A heterozygous brown eyed man marries a blue eyed woman, give the genotypic and phenotypic ratio of their offspring.

Answer:Phenotypic: 50% Brown Eyed

50% Blue Eyed Genotype: 50% Heterozygous Dominant

Brown Eyed50% Recessive Blue Eyed

I C E C R E A M

C O L O R B L I N D

S N A P D R A G O N

F O U R O’ C L O C K F L O W E R

S E X C H R O M O S O M E

B L O O D T Y P E

L A W B R E A K E R

“I f there’s LAW, there’s always gonna be Law Breaker!”

N O N - M E N D E L I A N G E N E T I C S

Non-Mendelian Genetics is a general term that refers to any pattern of inheritance which are not in accordance with Mendel’s laws.

Does this mean that Mendel’s Laws of Inheritance are incorrect?!

Let’s discover with our next activity!

Criteria for Group ActivityWork Content 40%Creativity 20%

Teamwork 20%Presentation/ Clarity of Information

20%

TOTAL 100%

Group1

In Japan a “Four o’clock Flower” usually has allele of a Red Flower and allele of a White Flower.

However when crossed, all the f1 hybrids have a Pink Flower.

Group1

In this case, the f1 hybrids have an appearance somewhat in between the phenotypes of the two parental varieties.

Group1

Setting Up a Punnet Square for this situation:

Use all capital letters. Use 2 different letters, one per

variation. The heterozygote will look blended. Example:

Homozygous Dominant #1 = AA (Red Flower)

Homozygous Dominant #2 = BB (White Flower)

Heterozygous = AB (Pink Flower)

Group2Coat colors

in cows usually appear in two alleles, White and Red Coats.However, when crossed F1 Hybrid resulted to Roan (white with red patches) offspring.

Group2In this case, both parental varieties appear

together in f1 hybrids.

Setting up a punnet square for this situation:

Use all capital letters. Use 2 different letters, one per variation. The heterozygote will show both colors/traits at

the same time, in patches. Example:

Homozygous Dominant #1 = AA (Red Coat) Homozygous Dominant #2 = BB (White Coat) Heterozygous = AB (Roan, White with Red patches)

Grpoup3

Colorblindness is one of the recessive gene traits that are carried on x-chromosome.

These are often the types of traits that appear to “skip” generations or genders, or often show up more frequently in males.

Genotypes Phenotypes

1. XX Normal female

2. XXc

Normal female,carrier of the gene

3.XcXc Color-blind female

4. XY Normal male

5. XcY Color-blind male

Group3

Setting up a punnet square First write the sex chromosomes per the gender

of the individual. Then figure out the genotype for the trait. w/o exponent= Normal (dominant) c= Colorblind (recessive) Write the allele-letters like exponents on the sex

chromosomes. “X-Linked” means it’s only on the x chromosome. “Carrier” refers to a female who is heterozygous.

She “carries” the recessive trait, but doesn’t show it.