punnett squares and heredity n.
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Punnett Squares and Heredity. Heredity. Topic 1: 200. Question : Who is considered the Father of Modern Genetics? Answer Gregor Mendel. Back. Topic 1: 400. Question : What plant did the Father of Modern Genetics spend years studying? Answer Pea Plant!. Back. Topic 1: 600. Question:

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Presentation Transcript
topic 1 200
Topic 1: 200
  • Question:
  • Who is considered the Father of Modern Genetics?
  • Answer
  • Gregor Mendel

Back

topic 1 400
Topic 1: 400
  • Question:
  • What plant did the Father of Modern Genetics spend years studying?
  • Answer
  • Pea Plant!

Back

topic 1 600
Topic 1: 600
  • Question:
  • Some traits are masked by other traits, what are these masked traits called?
  • Answer
  • Recessive traits

Back

topic 1 800
Topic 1: 800
  • Question:
  • Draw and label a recessive male marrying a hetero female – they have 3 kids – determine their genotypes as well
  • Answer
  • Pedigree answer

Back

topic 1 1000
Topic 1: 1000
  • Question:
  • Normal parents, whose daughter has the recessive trait also have a son who doesn’t carry the gene – draw a pedigree of this and label to show how it is possible
  • Answer

Back

topic 2 200
Topic 2: 200
  • Question:
  • Any characteristic that can be passed from parents to offspring
  • Answer
  • Trait

Back

topic 2 400
Topic 2: 400
  • Question:
  • What is heredity?
  • Answer
  • The passing of traits from parents to offspring

Back

topic 2 600
Topic 2: 600
  • Question:
  • The alleles present in the organism, i.e., BB, Bb, or bb
  • Answer
  • Genotype

Back

topic 2 800
Topic 2: 800
  • Question:
  • Which is a description of the phenotype?
    • 2 girls with Bb
    • Brown hair
  • Answer
  • Brown hair

Back

topic 2 1000
Topic 2: 1000
  • Question:
  • What are the genetic terms for genotypes with 2 of the same alleles and 2 different alleles? Give an example of each
  • Answer
  • Homozygous/purebred (HH/hh)
  • Heterozygous/carrier/hybrid (Hh)

Back

topic 3 200
Topic 3: 200
  • Question:
  • A way to figure out and organize the possible offspring genotypes is…
  • Answer
  • Punnett Square

Back

topic 3 400
Topic 3: 400
  • Question:
  • A heterozygous blue unicow mates with a homozygous purple unicow, list the possible offspring genotypes:
  • Answer
  • 2 Bb – blue
  • 2 bb - purple

Back

topic 3 600
Topic 3: 600
  • Question:
  • S – slimy skin s- rough skin
  • Gary the Snail is hybrid and his mate is pure slimy. What are the chances their baby snail will have beautiful slimy skin?
  • Answer
  • 100%

Back

topic 3 800
Topic 3: 800
  • Question:
  • Bobert has brown eyes, dominant to blue eyes. Boberta has blue eyes. How could they have a child who is homozygous rec?
  • Answer
  • Bobert is Bb and only then it is a 50% chance

Back

topic 3 1000
Topic 3: 1000
  • Question:
  • A red allele is dominant to a white allele. Two flowers containing these alleles were crossed and produced only red flowers. What are the possible parent genotypes? – (you must list them all for full credit)
  • Answer
  • RRxRR – RRxRr - RRxrr

Back

topic 4 200
Topic 4: 200
  • Question:
  • What are the male and female sex chromosomes?
  • Answer
  • Female – XX
  • Male - XY

Back

topic 4 400
Topic 4: 400
  • Question:
  • Why are males more likely than females to inherit sex-linked traits?
  • Answer
  • Males only need 1 copy of the recessive X – females need 2

Back

topic 4 600
Topic 4: 600
  • Question:
  • Which sex can be carriers on sex-linked traits? Why? Do they show the trait?
  • Answer
  • Females bc they have 2 X which means 2 alleles, 1 can be recessive, 1 dominant – which means they would not show the trait

Back

topic 4 800
Topic 4: 800
  • Question:
  • Mom is a carrier and dad has disorder D – a sex-linked recessive disorder. They have a son, what chance does he have of having disorder D? They are expecting their second baby, they do not know the babies sex - what is the chance they will have a baby girl who also has disorder D?
  • Answer
  • 50% and 25%

Back

topic 4 1000
Topic 4: 1000
  • Question:
  • A colorblind man marries a woman who has normal vision, but her father was colorblind. What is the chance that their child will be colorblind?
  • Answer
  • 50%

Back

topic 5 200
Topic 5: 200
  • Question:
  • Why are some traits considered ‘incompletely dominant’? What happens with the phenotype when a hybrid is formed from incomplete dominance
  • Answer
    • Some alleles are both equally strong, the resulting hybrid phenotype is a blend of the two alleles

Back

topic 5 400
Topic 5: 400
  • Question:
  • Ms. Post wants to breed her favorite pet cow. She really loves cow and researched how they inherit their cute spotted color, she found it is incomplete dominance between black and white genes. Her cow is heterozygous spotted, her new male bull is dominant black. What chance do the offspring have of being spotted?
  • Answer
  • 50%

Back

topic 5 600
Topic 5: 600
  • Question:
  • Prince Charming has straight hair, his Princess Charmina has gorgeous curly hair. The couple thinks a baby a with wavy hair would be an adorable mix of their traits in what situation would this be possible?
  • Answer
  • If hair texture is an incomplete dominant trait and heterozygous is the wavy hair trait

Back

topic 5 800
Topic 5: 800
  • Question:
  • Henry the Hippo has heterozygous medium length legs. He wants his kids to have dominant long legs, NOT dominant short legs so they can be the first hippo track stars. Who will Henry have to marry to have at least a 50% chance of long legs? At least 25% chance?
  • Answer
  • A dominant long or another hybrid medium

Back

topic 5 1000
Topic 5: 1000
  • Question:
  • Draw a pedigree showing a family where neither parent has a recessive autosomal disorder, but they have one male child who does and one female child who does not – give known genotypes
  • Answer
  • Parents are heterozygous, male is homozygous recessive, female is either homozygous domor hetero

Back

bonus question 5000 pts
Bonus Question: 5000 pts.
  • Question:
  • In birds, the sex chromosomes are Z and W. Females are ZW and males are ZZ.
  • Male chicken has barred (dominant) feathers, sex-linked on the Z – A female has non-barred feathers. What are the possible genotypes of this cross?
  • Explain whether or not male birds are more likely to have sex linked traits.
  • Answer
  • 2 carrier males ZBZb:2 barred females ZBW
  • Opposite of humans – female birds more likely

Back

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