The trait of medium-sized leaves in iris is determined by the heterozygous genotyp Rir. Plants with large leaves are IRIR, whereas plants with small leaves are l'I A crc 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 O c) 40 O d) 80

A cross is made between BbCc and bbcc plants and the offspring occur in the following numbers: 98 BbCc, 56 Bbcc, 54 bbCc, 92 bbcc. Genes b and c are linked on the same chromosome. What is the distance between the genes b and c?

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.

In the rare rainbow rose, it has been shown that flower color is controlled by 2 genes. No one knows how the 2 genes are related and several hypotheses have emerged to explain how they interact to produce flowers with purple, yellow, and green pedals. You cross purple and green flowering plants, and find that F1 are all yellow colored. You allow F1 to self-fertilize and this produces 222 purple, 222 yellow and 222 green flowers. The 2 most popular theories are: a co-dominance relationship or an epistatic relationship between the 2 genes. Your team deduces that if co-dominance should result in 216 purple, 220 yellow and 230 green. Where as, an epistatic relationship should result in 250 purple, 200 yellow, and 216 green.   1-Which hypothesis is correct? a- Co-dominace  b- Epistatic  and The odds the theory  you selected is correct  is (less or greater) than (10%,25%,50%,90%)