You successfully isolate an hsf2/hsf2; hsf3/hsf3 double mutant stock. You cross this plant to an hsf1/hsf1 plant and then self-pollinate the F1. You want to recover at least 10 triple mutant homozygous to evaluate the phenotype. How many plants do you need to genotype to expect to recover 10 triple mutant plants?

An otto hemp variety with the genotype RRbb is crossed with a Kush hemp  variety rrBb (Given that RR is homozygous resistance to mildew, BB is homozygous large buds). What percent of fraction of the offsprings would have large buds and resistant to mildew? A)50% B)25% C)0% D)75%

Red flowers are dominat to white flowers, and tall stems are dominant to short stems. A plant that is homozygous for red flowers and heterozygous for height is crossed with a plant that is heterozygous for both traits.  a) show the alleles for both traits, using proper notation b) Possible genotypes for red flowers, and for white flowers c) Possible genotypes for tall plants, and for short plants d) give the full genotypes for each plant e) give the possible gametes for each plant f) give the phenotype ration of the offspring

1)    Two true-breeding varieties of maize, one 11 cm high and the other 47 cm high were crossed and the resultant  F1 hybrids were then crossed to generate the  F2 . In the F2 there were a total of 13,923 plants with a continuous variation in heights between the two extremes and with only 3 plants as large as 47 cm high and 5 plants  of 11 cm high. a) How many i) genes and ii) how many alleles are involved in determining height in this plant? b) What is the contribution of each dominant allele to the phenotype in cm?

During the course of a research project you generate a gene knockout line in Arabidopsis thaliana to study the function of a gene you believe plays a crucial role in cellular metabolism.  You note that the initial transformants are a bit smaller than normal.  In subsequent crosses you are unable to isolate homozygotes for the knockout allele.  Heterozygotes in subsequent generation are still a bit smaller than the homozygous wild type plants.   Explain what is happening.

The trait of medium-sized leaves in iris is determined by the heterozygous genotype RIr. Plants with large leaves are IRIR, whereas plants with small leaves are l'I A cross is made between two plants, each with medium-sized leaves. If they produce 80 seedlings, what would be the expected number of seedlings with small leaves? O a) 0 O b) 20 c) 40 d) 80

A plant with the genotype AAbb was crossed with one with the genotype aaBB. The F1 plants were testcrossed. If the genes are not linked, the expected genotypic ratio in the offspring of this testcross would be?

A series of experiments shows that oil content in a diploid grain is influenced by four genes (a through d) with additive alleles. The highest-producing strain has 30% oil content; the lowest has 0%. A plant of unknown genotype has an oil content of 22.5%. What is a possible genotype for this plant (+ - additive alleles)? O at a+ b+ bccdd O at a+ b+ b+ c+ c+ d+ d O a+ a+ b b+ c+ c+ d+ d O aa b+ b c+c d+ d+ O a+ a+ b+ b+ccdd

You cross two yeast strains one is an ade auxotroph the other is a pro auxotroph and allow the diploid to sporulate. When you score each spore in the ascus you find the following proportions: 518 PD, 8 NPD, and 225 T. a.) What are the genotypes of each spore in all three types of the tetrads. b) Are these genes linked why or why not? c.) If these genes are unlinked what would you expect the progeny numbers and ratios to be? d.) What is the formula to determine the most accurate distance between these genes? If linked what is the map distance?

A researcher crosses two white-flowered lines ofAntirrhinum plants as follows and obtains the followingresults:pure line 1 × pure line 2↓F1 all whiteF1 × F1↓F2 131 white29 reda. Deduce the inheritance of these phenotypes; useclearly defined gene symbols. Give the genotypes ofthe parents, F1, and F2.b. Predict the outcome of crosses of the F1 with eachparental line.