GENETICS PRACTICE

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

O T T F F S S E __ It’s EASY if you know the PATTERN! (Just like Punnett Squares) NENE WOWO HREEHREE OUR OUR IVEIVE IXIX EVENEVEN IGHTIGHT 9 NINENINE

R r Y yR r Y y HETEROZYGOUS ROUND YELLOW PRACTICE MAKING GAMETES WHAT ARE THE POSSIBLE GAMETES THIS PARENT CAN MAKE ? Each gamete should get one of each kind of gene ___________ ____________ _____________ _____________ R YR Y r yr y r Yr YR yR y

RYRyrYry RY Ry rY ry Sign of a ______________________ cross is a _____________ ratio in offspring. 9:3:3:1 ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green RRYY RRYy RrYYRrYy RRYy RRyy RrYy Rryy RrYY RrYy rrYY rrYy RrYy Rryy rrYy rryy heterozygous dihybrid

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

Making offspring with MULTIPLICATION

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

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

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

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

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

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 ______________________________

A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type 785- black-vestigial 158- black- normal wings 162- gray body-vestigial wings

T t t Tt t t IF GENE is AUTOSOMAL and RECESSIVE TO + Expect 1:1 50% -Dominant 50% - Recessive

RYRyrYry. 1:1:1:1 ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green RrYy Rryy rrYyrryy RrYy Rryy rrYy rryy RrYy Rryy rrYy rryy RrYy Rryy rrYy rryy

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

A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type 785- black-vestigial 158- black- normal wings 162- gray body-vestigial wings Is it 9:3:3:1? Is it 3 Wild type : 1 black vestigial?

A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type 785- black-vestigial 158- black- normal wings 162- gray body-vestigial wings What is the recombination frequency between these genes?

A Wild type fruit fly (heterozygous for gray body and normal wings) is mated with a black fly with vestigial wings. OFFSPRING: 778- wild type 785- black-vestigial 158- black- normal wings 162- gray body-vestigial wings What is the recombination frequency between these genes?

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 eyes 751- black body/purple eyes 49- gray body/purple eyes 45- black body/red-eyes What is the recombination frequency between these genes?

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%

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%

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%

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 eyes 751- black body/purple eyes 49- gray body/purple eyes 45- black body/red-eyes What is the recombination frequency between these genes?

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%

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%

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

RYRyrYry RY Ry rY ry Sign of a ______________________ cross is a _____________ ratio in offspring. 9:3:3:1 ____ Round & Yellow ____ Round & green ____ Wrinkled & yellow ____ wrinkled & green RRYY RRYy RrYYRrYy RRYy RRyy RrYy Rryy RrYY RrYy rrYY rrYy RrYy Rryy rrYy rryy heterozygous dihybrid