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GENETICS PRACTICE

GENETICS PRACTICE. O T T F F S S E __. What comes next?. 9. IGHT. I V E. I X. NINE. EVEN. 1 2 3 4 5 6 7 8. O U R. O T T F F S S E __. H R E E. N E. W O. It’s EASY if you know the PATTERN! (Just like Punnett Squares). PRACTICE MAKING GAMETES.

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GENETICS PRACTICE

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  1. GENETICS PRACTICE

  2. O T T F F S S E __ What comes next?

  3. 9 IGHT I V E I X NINE EVEN 1 2 3 4 5 6 7 8 O U R O T T F F S S E __ H R E E N E W O It’s EASY if you know the PATTERN! (Just like Punnett Squares)

  4. PRACTICE MAKING GAMETES WHAT ARE THE POSSIBLE GAMETES THIS PARENT CAN MAKE? HETEROZYGOUSROUND YELLOW Each gamete shouldget one of each kindof gene RrYy RY ry rY Ry ___________ ____________ _____________ _____________

  5. RY Ry rY ry RY Ry rY ry ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green 9 RRYYRRYyRrYY RrYy RRYy RRyy RrYy RryyRrYY RrYyrrYY rrYyRrYyRryy rrYyrryy 3 3 1 heterozygous dihybrid Sign of a ______________________ cross is a _____________ ratio in offspring. 9:3:3:1

  6. 9 ____ ____________ TRAIT 1 ; ____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 dominant dominant 3 dominant recessive 3 recessive dominant 1 recessive recessive __________ratio is a clue that it’s a _________________________cross 9:3:3:1 HETEROZYGOUS TWO gene (DIHYBRID)

  7. Making offspring with MULTIPLICATION

  8. What is the probability? AaBBCcdd parent genome What is the probability of producing a gamete with this gene combination? ABCd _____________________________ AbCd ______________________________ abcd _______________________________

  9. What is the probability? AaBBCcdd X AabbCCDd parents What is the probability of producing a offspring with this gene combination? AABbCcDd _____________________________ AaBBccdd______________________________ aaBbccDd_______________________________

  10. What is the probability? AaBBCcdd parent genome What is the probability of producing a gamete with this gene combination? ABCd _____________________________ Abcd ______________________________ Abcc _______________________________

  11. What is the probability? AaBBCcdd X AabbCCDd parents What is the probability of producing a offspring with this gene combination? AABbCcDd _____________________________ AaBBccdd______________________________ aaBbccDd_______________________________

  12. PEDIGREES = male; doesn’t show trait = female; doesn’t show trait = shows trait = carrier; doesn’t show trait

  13. The genotype of F1 individuals in a tetrahybrid cross is AaBbCcDd X AaBbCcDd Assuming independent assortment of these four genes, what are the probabilities that F2 offspring will have the following genotypes? aabbccdd ______________________________ AaBbCcDd ______________________________ AaBBCCdd ______________________________

  14. A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type785- black-vestigial158- black- normal wings162- gray body-vestigial wings

  15. IF GENE is AUTOSOMAL and RECESSIVE TO + Expect 1:1 T t t t Tt t t Tt tt 50% -Dominant50% - Recessive http://www.exploratorium.edu/exhibits/mutant_flies/curly-wings.gif

  16. RY Ry rY ry ry ry ry ry ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green 4 RrYyRryyrrYyrryy RrYy Rryy rrYy rryyRrYy RryyrrYyrryyRrYyRryyrrYyrryy 4 4 4 . 1:1:1:1

  17. 9 ____ ____________ TRAIT 1 ; ____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 ____ ____________ TRAIT 1; _____________ TRAIT 2 dominant dominant 3 dominant recessive 3 recessive dominant 1 recessive recessive __________ratio is a clue that it’s a _________________________cross 9:3:3:1 HETEROZYGOUS TWO gene (DIHYBRID)

  18. A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type785- black-vestigial158- black- normal wings162- gray body-vestigial wings Is it 9:3:3:1? Is it 3 Wild type : 1 black vestigial?

  19. A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type785- black-vestigial158- black- normal wings162- gray body-vestigial wings What is the recombination frequency between these genes?

  20. A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type785- black-vestigial158- black- normal wings162- gray body-vestigial wings What is the recombination frequency between these genes?

  21. A Wild type fruit fly (heterozygous for gray body and red eyes) is mated with a black fly with purple eyes. OFFSPRING: 721- gray body/red eyes751- black body/purple eyes49- gray body/purple eyes45- black body/red-eyes What is the recombination frequency between these genes?

  22. Determine the sequence of genes along a chromosome based on the following recombination frequencies A-C 20% A-D 10% B-C 15% B-D 5%

  23. Determine the sequence of genes along a chromosome based on the following recombination frequencies A-C 10% A-D 30% B-C 24% B-D 16%

  24. Determine the sequence of genes along a chromosome based on the following recombination frequencies A-B 8% A-C 28% A-D 25% B-C 20% B-D 33%

  25. A Wild type fruit fly (heterozygous for gray body and red eyes) is mated with a black fly with purple eyes. OFFSPRING: 721- gray body/red eyes751- black body/purple eyes49- gray body/purple eyes45- black body/red-eyes What is the recombination frequency between these genes?

  26. Determine the sequence of genes along a chromosome based on the following recombination frequencies A-B 8% A-C 28% A-D 25% B-C 20% B-D 33%

  27. Determine the sequence of genes along a chromosome based on the following recombination frequencies A-B 8% A-C 28% A-D 25% B-C 20% B-D 33%

  28. Determine the sequence of genes along a chromosome based on the following recombination frequencies A-C 10% A-D 30% B-C 24% B-D 16% CABD

  29. RY Ry rY ry RY Ry rY ry ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green 9 RRYYRRYyRrYY RrYy RRYy RRyy RrYy RryyRrYY RrYyrrYY rrYyRrYyRryy rrYyrryy 3 3 1 heterozygous dihybrid Sign of a ______________________ cross is a _____________ ratio in offspring. 9:3:3:1

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