Punnett squares

Punnett Squares ,[object Object],[object Object],[object Object],[object Object]

PUNNETT SQUARES ,[object Object],[object Object]

PUNNETT SQUARES ,[object Object]

CONT’D ,[object Object],T T T t T T T T T t T t

Practice with Punnett Squares ,[object Object],Offspring phenotypes: all would be round

Punnett square practice ,[object Object],Ratio of phenotypes 3:4 purple 1:4 white Ratio of genotypes 1:4 homozygous dominant 2:4 heterozygous 1:4 homozygous recessive

Punnett square practice ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],2. If a wingless dragon is crossed with one that is heterozygous, how many of its offspring will also be wingless? Punnett square practice…

[object Object],[object Object],[object Object],[object Object],[object Object],RT, Rt, rT, rt

Mendel's Law of Independent Assortment – Illustrated by the DIHYBRID cross ,[object Object],[object Object],[object Object]

DIHYBRID CROSS ,[object Object],[object Object],[object Object],ALL THE OFFSPRING ARE ROUND

DIHYBRID CROSS – 1 ST GENERATION CONT’D ,[object Object],ALL THE F1 WERE ROUND AND YELLOW

DIHYBRID CROSS – 2 ND GENERATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

EXPLANATION OF 2 ND GENERATION ,[object Object],[object Object],[object Object]

DIHYBRID CROSSES ,[object Object],[object Object],[object Object],[object Object],[object Object]

H h G g X H h G g 1. HG 2. Hg 3. hG 4. hg FOIL – FIRST, OUTSIDE, INSIDE, LAST BOTH PARENTS ARE THE SAME

NOW LET’S DO A DIHYBRID CROSS ,[object Object],HG Hg hG hg HG Hg hG hg HHGG HHGg HhGG HhGg HHGg HHgg HhGg Hhgg HhGG HhGg hhGG hhGg HhGg Hhgg hhGg hhgg

WHAT ARE THE PHENOTYPIC RATIO’S? ,[object Object],HG Hg hG hg HG Hg hG hg HHGG HHGg HhGG HhGg HHGg HHgg HhGg Hhgg HhGG HhGg hhGG hhGg HhGg Hhgg hhGg hhgg ,[object Object],[object Object],[object Object],[object Object]

PROBABILITY ,[object Object],[object Object],[object Object]

Punnett squares

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Punnett squares