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All Genetics Tests
Multiple Choice Questions From all Genetics Questions
| Question | Answer |
|---|---|
| Which enzymes are needed to produce recombinant plasmids that are used in gene transfer? | Restriction enzymes and ligase |
| What two phrases describes the behavious of chromosomes in metaphase I? | Chromosomes line up at the equator and Tetrads (bivalents) line up at the equator |
| What phrase describes the behaviour of chromosome in anaphase II? | Separation of the sister chromatids. |
| If a plant of genotype Ssyy is crossed with a plants of genotype ssYy, which offspring are recombinants? | SsYy and ssyy |
| What constitutes a linkage group? | Genes carried on the same chromosome. |
| A cell with a diploid number of chromosomes undergoes meiosis. What will be the product at the end of meiosis? | 4 cells each with 6 chromosomes |
| A parent organism of unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result? | The parent is heterozygous for the trait. |
| Which process results in the greatest genetic variation in a population? | Meiosis |
| A polygenic character is controlled by two genes each with two alleles. How many different possible genotypes are there for this character? | 9 |
| A woman who is a carrier of hempphilia marries a man who is not afftected. What are the possible genotypes of thei children? | xHxh, xHxH, xHy, xhy |
| A cross is performed between two organisms with the genotypes AaBb and aabb. What genotypes in the offspring are the result of recombination? | Aabb, aaBb |
| If red (RR) is crossed with white (rr) and produces a pink flower (Rr), and tall (D) is dominant to dwarf (d), what is the phenotypuc ratio from a cross of Rr dd and rr Dd? | 1:1:1:1, in which 50% are tall, 50% are dwarf, 50% are pink and 50% are white. |
| What is the advantage of using pectinase in fruit juice production? | The pectin content of the fruit is reduced, making the juice easier to extract. |
| In two pea plants with the genotypes YyRr and Yyrr are crossed together, what ratio of phenotypes is expected in the offspring? | 3 round yellow: 1 round green: 3 wrinkled yellow: 1 wrinkled green |
Created by:
bullockc
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