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Mendelian Genetics: Pigs Workbook Part 1

Biology13 CardsCreated 4 months ago

This deck covers key concepts in Mendelian genetics using a pig breeding scenario. It includes questions about phenotype ratios, allele dominance, and genetic frequencies.

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Are all the pigs in the F2 generation the same color? A. Yes B. No

B
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Key Terms

Term
Definition
Are all the pigs in the F2 generation the same color? A. Yes B. No
B
What proportion of the F2 offspring are black versus brown? A. Half are black and half are brown. B. One quarter are black and three quarters are brown. C. Three quarters are black and one quarter are brown. D. Two thirds are black and one third are brown. E. None of the above.
C
What phenotype do you think is associated with genotype BW? A. Black B. Dark brown C. Brown D. I'm not sure
A
For your F1 x F1 cross, Mendel's model predicts that, for every brown pig among the F2 offspring there should be how many black pigs? A. One B. Two C. Three D. Four
C
ARE DOMINANT ALLELES ALWAYS COMMON? A. Yes B. No
B
Do dominant alleles automatically become more common in a population over time? A. Yes B. No C. I'm not sure
B
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Mendelian Genetics: Pigs Workbook Part 1
TermDefinition
Are all the pigs in the F2 generation the same color? A. Yes B. No
B
What proportion of the F2 offspring are black versus brown? A. Half are black and half are brown. B. One quarter are black and three quarters are brown. C. Three quarters are black and one quarter are brown. D. Two thirds are black and one third are brown. E. None of the above.
C
What phenotype do you think is associated with genotype BW? A. Black B. Dark brown C. Brown D. I'm not sure
A
For your F1 x F1 cross, Mendel's model predicts that, for every brown pig among the F2 offspring there should be how many black pigs? A. One B. Two C. Three D. Four
C
ARE DOMINANT ALLELES ALWAYS COMMON? A. Yes B. No
B
Do dominant alleles automatically become more common in a population over time? A. Yes B. No C. I'm not sure
B
Are recessive alleles always rare? A. Yes B. No C. I'm not sure
B
Do recessive alleles automatically become less common in a population over time? A. Yes B. No C. I'm not sure
B
How many different phenotypes were in the F2 generation, and why? A. Two different phenotypes, as with the grandparents. This is because the W allele is dominant over the S allele, so there is one phenotype (brown) if W is present and another if it is absent. B. Three different phenotypes: Those of the original grandparents, plus a third phenotype from the WS pigs. The WS pigs have two non-dominant alleles together which leads to co-dominance. C. Three different colors, those of the original grandparents and a third color from the WS pigs. The WS pigs are brown where W is dominant over S, and black where S back mutates to B.
C
Recall that you started this lab by establishing pure-breeding populations of pigs (one brown and one black). What does pure-breeding mean, genetically? A. If you breed two pigs and all the offspring look the same as each other, they are pure-breeding. B. If you breed two pigs and cull all offspring except those having the one genotype you're targeting, the remainder are pure-breeding. C. If you breed two pigs and all the offspring have the same genotype as each other they are pure-breeding. D. If you breed two pigs and all the offspring have the same genotype as their parents, they are pure-breeding.
D
A large population is founded with a dominant allele of a gene at a frequency of 0.6 and a recessive allele of that gene at a frequency of 0.4. The gene is not under selection. Given what you know, which frequency is the dominant allele most likely to have after many generations? A. 0.5 B. 0.6 C. 0.75 D. 1
B
A large population is founded with two co-dominant alleles of a gene at frequencies of 0.4 and 0.4. A third allele of the same gene, dominant over both of the others, has an initial frequency of 0.2. The gene is not under selection. Given what you know, which frequency is the dominant allele most likely to have after many generations? A. 0.2 B. 0.33 C. 0.5 D. 1.0
A
Do whole populations tend to show the same round ratios of phenotypes? A. Yes B. No C. I'm still not sure
B