Week 9 HW - IB 150

On the given Punnett square, what do the letters used as column and row headings represent (eg TB, Tb, tB, and tb)?

gamete genotypes

Which of the 5 hypotheses in the preceding question would result in gametes of at least one parent that are very likely NOT produced in equal frequencies?

hypothesis 4

What is the probability that George VI who is the ancestor of today's British Royals was a carrier for hemophilia B and hence could have passed the condition on to the modern royal family members?

0

If they have 2 children, what is the probability that 1 of them will have this disorder?

0.0

A woman is about to deliver triplets. If each child is the product of an independent fertilization event (ie fraternal twins, not identical twins), what is the probability that all of her babies will be of the same gender (ie, she will deliver EITHER all girls OR all boys)?

0.25

If your inferences based on their known pedigree are correct, what is the probability that Jessica's and Tom's first baby will have free earlobes and thin eyebrows?

0.25

If 2 Manx cats mate, what proportion of living offspring will have long tails?

1/3

Based on the phenotypes of her and her ancestors, what was the genotype of Belquest's Last Laugh?

E_Bb

For the Punnett square in the previous question, what proportion of the offspring have a phenotype that is DIFFERENT from the phenotype of either parent?

7/16

Based on these data, what do you conclude about your initial hypothesis?

Reject my initial hypothesis.

a) What is the probability that the mom will donate a recessive allele to any of her offspring? b) What is the probability that the dad will donate a dominant allele to any of his offspring ? c) If their first three children have the disease, what is the probability that their fourth child will not? d) If instead we assume that they have not yet had any children but will have 4 children in the future, what is the probability that all four children will have phenotypic symptoms of the disease?

a) 1/2 b) 1/2 c) 3/4 d) 1/256

a) 1/2 pied: 1/2 yellow among offspring b) 1/8 green: 2/8 pied: 5/8 yellow among offspring c) 1/4 pied: 3/4 yellow among offspring d) 3/8 pied: 5/8 yellow among offspring e) 1/4 green: 1/4 pied: 2/4 yellow offspring

a) F2 is yellow because it is homozygous recessive fo gene B b) F2 is yellow because it is homozygous recessive for gene A c) F2 is yellow because it is homozygous recessive for gene A and gene B d) F2 is yellow because it is homozygous recessive for gene B e) F2 is yellow because it is homozygous recessive for gene A

Years pass, and Jessica and Tom just had a kid, and they send you a picture of the three of them. You are surprised to see that the baby has thin eyebrows and attached earlobes. What does this tell you>

a) Jessica's genotype must be EeFf b) Given what you know now about Jessica and Tom's genotype after seeing their first baby, you realize that prior to inception, the chances of their child showing the thin eyebrow, attached earlobe phenotype was only 1/16. c) At least some of Jessica's direct ancestors must be carriers of the recessive allele for gene F, including at least one of her parents.

a) What would be the best mole rate phenotype and genotype to mate with the male so you can make a reliable determination of the genotype of the father? b) What is this cross called? c) What are the expected genotypic ratios from this cross? - if the brown male is genotype BB: - if the brown male is genotype Bb: d) What are the expected phenotypic ratios from this cross? - if the brown male is genotype BB: - if the brown male is genotype Bb:

a) phenotype: pink; genotype: bb b) test cross c) 1:0, 1:1 d) 1:0, 1:1

a) Even if the father shows the trait, she will not. b) She can only show the trait, if her father shows it phenotypically as well. c) If the father does not show the trait, she can still phenotypically show the trait. d) She can only show the trait, if her mother shows it phenotypically as well.

a) possible b) definitely true c) definitely false d) definitely false

Which best describes the mode of inheritance in the pedigree shown below?

autosomal recessive

Considering only the 2 genes shown, which of the following processes was NOT capable to produce genetic diversity among the gametes of an individual?

∙independent assortment ∙ sex linkage ∙ fertilization