Wednesday 2/12/14

• Groups that have not yet presented need to be ready to present when the bell rings.

Review #1

• In Dodo birds the allele for being dumb is dominant to the allele for being smart. What would be the offspring of a homozygous recessive Dodo with a heterozygous Dodo?

#2

• In rabbits, black color is due to the dominant gene B and brown color is due to its recessive allele b. Short hair is due to the dominant gene S and long hair to its recessive allele s. In a cross between a heterozygous black, heterozygous short-hair male and a homozygous brown long-hair female, what are the possible genotypes and what is the ratio of phenotypes?

#3

• Suppose that you are an explorer who has found a new species of plant. Some of the plants have red flowers and some have yellow flowers. You cross a red-flowered plant with a yellow-flowered plant and all the offspring have orange flowers. What is the most probable explanation?

#4

• Gorilla body cells have 48 chromosomes. What is the diploid number for gorillas?

#5

• BABY GIRAFFES GET 31 CHROMOSOMES FROM EACH PARENT. WHAT IS THE HAPLOID NUMBER IN GIRAFFES?

#6

• MENDEL CALLED THESE THINGS FACTORS. WE NOW KNOW THEY CARRY OUR CHARACTERISTICS AND INHERITANCE

#7

• GENES OFTEN HAVE MORE THAN ONE FORM. WHAT DO WE CALL THESE DIFFERENT FORMS?

#8

• ONLY A COMBINATION BETWEEN THESE TWO TYPES OF ORGANISMS WILL RESULT IN A GENOTYPIC RATIO OF:1:2:1

#9

• A DIHYBRID CROSS BETWEEN TWO PARENTS HETEROZYGOUS FOR BOTH TRAITS WILL RESULT IN WHAT PHENOTYPIC RATIO?

#10

• A CROSS RESULTED IN 50% RED FLOWERS, AND 50% RED AND WHITE SPOTTED FLOWERS. WHAT IS THE INHERITANCE PATTERN?

#11

• THE HOMOLOGOUS CHROMOSOMES PAIR UP DURING THIS PHASE OF MEIOSIS.

#12

• A woman with heterozygous A blood is crossed with a man who has heterozygous B blood. What are the blood types the children could be?

#13

• What is the probability of rolling a 1 or a 3 on a six sided dice twice in a row?

#14

• What is the karyotype for a normal male?

#15

• When does the “coinflip” happen?

#16

• Hemophilia is a sex linked trait. A woman who is normal and not a carrier is crossed with a male who has hemophilia. What are the possible genotypes and phenotypes of their offspring?

#17

• The likelihood two genes will be separated by crossing over is related to what?

Review #1

• In Dodo birds the allele for being dumb is dominant to the allele for being smart. What would be the offspring of a homozygous recessive Dodo with a heterozygous Dodo?

• 50% dumb 50% smart

#2

• In rabbits, black color is due to the dominant gene B and brown color is due to its recessive allele b. Short hair is due to the dominant gene S and long hair to its recessive allele s. In a cross between a heterozygous black, heterozygous short-hair male and a homozygous brown long-hair female, what are the possible genotypes and what is the ratio of phenotypes?

#3

• Suppose that you are an explorer who has found a new species of plant. Some of the plants have red flowers and some have yellow flowers. You cross a red-flowered plant with a yellow-flowered plant and all the offspring have orange flowers. What is the most probable explanation?

#4

• Gorilla body cells have 48 chromosomes. What is the diploid number for gorillas?

• 48

#5

• BABY GIRAFFES GET 31 CHROMOSOMES FROM EACH PARENT. WHAT IS THE HAPLOID NUMBER IN GIRAFFES?

• 31

#6

• MENDEL CALLED THESE THINGS FACTORS. WE NOW KNOW THEY CARRY OUR CHARACTERISTICS AND INHERITANCE

• Genes

#7

• GENES OFTEN HAVE MORE THAN ONE FORM. WHAT DO WE CALL THESE DIFFERENT FORMS?

• Alleles

#8

• ONLY A COMBINATION BETWEEN THESE TWO TYPES OF ORGANISMS WILL RESULT IN A GENOTYPIC RATIO OF:1:2:1

• 2 heterozygous organisms

#9

• A DIHYBRID CROSS BETWEEN TWO PARENTS HETEROZYGOUS FOR BOTH TRAITS WILL RESULT IN WHAT PHENOTYPIC RATIO?

• 9:3:3:1

#10

• A CROSS RESULTED IN 50% RED FLOWERS, AND 50% RED AND WHITE SPOTTED FLOWERS. WHAT IS THE INHERITANCE PATTERN?

• Codominance

#11

• THE HOMOLOGOUS CHROMOSOMES PAIR UP DURING THIS PHASE OF MEIOSIS.

• Prophase I

#12

• A woman with heterozygous A blood is crossed with a man who has heterozygous B blood. What are the blood types the children could be?

• AB, A heterozygous, B heterozygous, O blood

#13

• What is the probability of rolling a 1 or a 3 on a six sided dice twice in a row?

• 1/9

#14

• What is the karyotype for a normal male?

• 46 XY

#15

• When does the “coinflip” happen?

• Metaphase I

#16

• Hemophilia is a sex linked trait. A woman who is normal and not a carrier is crossed with a male who has hemophilia. What are the possible genotypes and phenotypes of their offspring?

• XBXb XBXb XBY

#17

• The likelihood two genes will be separated by crossing over is related to what?

• How far away the genes are on the chromosomes.