Seedless watermelons that you find in the supermarketare triploids, where x = 11.a. At what frequency are balanced gametes generatedby triploid watermelons?
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Seedless watermelons that you find in the supermarket
are triploids, where x = 11.
a. At what frequency are balanced gametes generated
by triploid watermelons?
Genetics is a branch of science that deals in the study of genes, heredity, and genetic variation of an organism. Moreover, the genetics also studies about the genetic disorders, mutation in genes, and gene editing to overcome certain hereditary diseases.
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- Seedless watermelons that you find in the supermarketare triploids, where x = 11.a. At what frequency are balanced gametes generatedby triploid watermelons?b. What is the probability that a particular seed in atriploid watermelon will be viable? (Recall that aviable seed is a euploid zygote.)c. What is the ploidy of the viable seed in part (b)?More than one answer may applySuppose you have an AAaa tetraploid plant and it undergoes self-fertilization. At least two copies of thedominant allele A are needed to obtain the dominantphenotype. At what frequency will progeny with thedominant phenotype appear?Large ear of corn has a total of 433 grains, including 26 Yellow & Shrunken, 73 Purple & Shrunken, 63 Yellow & Smooth, and 271 Purple & Smooth. Determine whether the ratio of corn kernels support the hypothesis that the plant is heterozygous.
- A triploid plant has 18 chromosomes (i.e., 6 chromosomes perset). If we assume a gamete has an equal probability of receivingone or two copies of each of the six types of chromosome, whatare the odds of this plant producing a haploid or a diploid gamete?What are the odds of producing an aneuploid gamete? If theplant is allowed to self-fertilize, what are the odds of producing aeuploid offspring?In moss, the genes A and B are expressed only in the gametophyte. A sporophyte of genotype A/a ; B/b is allowed to produce gametophytes.a. What proportion of the gametophytes will be A ; B?b. If fertilization is random, what proportion of sporophytes in the next generation will be A/a ; B/b?Suppose you have an AAaa tetraploid plant and it undergo self- fertilization. At least two copies of the dominant allele A are needed to obtain the dominant phenotype. At what frequency will progeny with the dominant phenotype appear?
- GgTt pea plants can produce _____ type(s) of gamete(s), but a ggtt plant can produce _____ type(s) of gamete(s). explainAt the molecular level (with regard to loss-of-function alleles), explain why the ttvv homozygote has an ovate seed capsule.An allotetraploid plant has 30 chromosomes in its somatic cells and one of its progenitor species has n = 7. What is the chromosome number in the gametes of the other species? Explain.
- Consider this four-factor cross: Tt Rr yy Aa × Tt RR Yy aa, whereT = tall, t = dwarf, R = round, r = wrinkled, Y = yellow, y = green,A = axial, a = terminal. What is the probability that the first three plantswill have round seeds? What is the easiest way to solve this problem?In a cross between two varieties of corn, gl1gl1Ws3Ws3 (egg parent) * Gl1Gl1ws3ws3 (pollen parent), a triploid offspring was produced with the genetic constitution Gl1Gl1gl1Ws3ws3ws3. From which parent, egg or pollen, did the 2n gamete originate? Is another explanation possible? Explain.A diploid plant is heterozygous for two linked genes, A and B. Crossovers between the two genes occurs in ~10% of meiosis. Multiple crossovers are never observed in one cell undergoing meiosis. What fraction of the gametes produced by this diploid plant are expected to be recombinant type? O 5% O 10% 2.5% 25%