Concept explainers
What genotypes, and in what frequencies, will be present in the offspring from the following matings?
a.
b.
c.
d.
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Biology: The Dynamic Science (MindTap Course List)
- The diagram above depicts Select one: a. nondisjunction b. complete dominance c. crossing over d. the law of segregationarrow_forwardA gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears of corn that have an approximately even mix of yellow and white kernels. Which term best describes the relationship between the two alleles? Choose 1 answer: A. Genetic recombination B. Codominance C. Incomplete dominance D.Chimerismarrow_forwardWhat is the difference between a monohybrid cross and a dihybrid cross? A. A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents. B. A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny. C. A monohybrid cross involves organisms that are heterozygous for a single trait, whereas a dihybrid cross involves organisms that are heterozygous for two traits. D. A monohybrid cross is performed only once, whereas a dihybrid cross is performed twice.arrow_forward
- after crossing two tall pea plants, a scientist notes that approximately3/4 are tall, while approximately 1/4 are short. The scientist is noting the offspring' a. phenotypes b. genotypes c. wild types d. karyotypesarrow_forwardEach letter below represents an allele. Which of the following is an example of a dihybrid cross? a. R × R c. Rr Yy × Rr Yy b. Rr × Rr d. RR yy × rr YYarrow_forwardWhich of the following crosses will yield only recessive offsprings? show your solution using punnet square. a. WwXx x wwxx b. WWXx x WWXx c. WWXX x wwxx d. wwxx x wwxxarrow_forward
- The following recombination frequencies are calculated for four linked genes in the image attached: What is the frequency of crossing-over between A and D? a. 8% b. 6% c. 15% d. 11%arrow_forwardUnder what situation would you expect haplotype frequencies to remain unchanged from one generation to the next? a. crossing over between two loci is extremely rare b. the two loci are in linkage disequilibrium c. the recombination rate is greater than zero d. the coefficient of LD is either 0.25 or -0.25arrow_forwardA true breeding plant that produces yellow seeds is crossed with a true breeding plant that produces green seeds. All of the seeds of the offspring are yellow. Why? A. All of the offspring are homozygous for the yellow allele B. The alleles are codominant C. The yellow allele is dominant to the green allele D. The yellow allele is recessive to the green allele E. Yellow is an easier color to producearrow_forward
- A cross occurs between a black homozygous mouse and a white homozygous mouse. They produce gray offspring. Respond to the question based upon this scenario. What are the percentage probabilities for the genotype and phenotype of the offspring? a. 100% black; 100% Bb b. 100% gray; 100% bb c. 100% white; 75% Bb, 25% bb d. 100% gray; 100% Bbarrow_forwardIf a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type female, what proportion of the progeny will be mutant males? A. 50% B. 0% C. 75% D. 100%arrow_forwardA cross is made between a heterozygote, +++/abc, and a recessive homozygote, abc/abc. Analysis of the progeny gave the following results: 450 10 a + c 70 + b c 210 + b + 65 a + + 200 abc 460 ab+ 15 What is the map distance between the b and c genes? O9.12 map units O 10.81 map units O 12.14 map units O 13.95 map units ONone of the above PrtScn Home End %23 %24 & 7. 3. 4. 7 W R Y H. K C V この #:arrow_forward