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AA-Bio Final Exam-3
mod 9 Practice Lecture
| Question | Answer |
|---|---|
| If short hair (L) is dominant to long hair (l), then to determine the genotype of a short-haired animal it should be crossed with | ll |
| Which of the following would be considered a dihybrid genotype? | WwSs |
| Hybrid organisms produced from a cross between two pure-breeding organisms belong to which generation? | F1 |
| In dealing with incomplete dominance, the following, Pw, is a _______________. | genotype |
| If an organism heterozygous for one trait is crossed with an organism that is also heterozygous for one trait, the phenotypic ratio of the offspring will be ________. | 1:1 |
| In humans, brown eyes (B) are dominant over blue eyes (b). A brown-eyed woman who has a blue-eyed child must have the genotype | Bb |
| In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). If a solid red male was crossed with a black female to produce a red spotted puppy, the genotypes of the parents (with male genotype first) would be | bb Ss x Bb Ss. |
| Which of the following represents a monohybrid cross? | Aa x Aa |
| Mendel carried out most of his research with | plants |
| An individual with a genetic makeup of aa BB is said to be | pure breeding |
| Which of the following is a (are) possible gamete(s) for the genotype Ww? W w Ww | Both a and b |
| Assuming complete dominance will occur, the offspring of the cross (Aa x Aa) will show a phenotypic ratio of | 3:1 |
| In the expected phenotypic ratio (9:3:3:1) in the F2 generation of a dihybrid cross, the 1 represents the proportion of offspring ____________. | with pure recessive traits |
| A man with a widow's peak (dominant) who can curl his tongue (dominant) has a child who has a continuous hairline (recessive) and cannot roll the tongue (recessive). What is the genotype of the father? | WwTt |
| Which of the following represents a homozygous condition? | bb |
| If tall (D) is dominant to dwarf (d), and two homozygous varieties DD and dd are crossed, then what kind of offspring will be produced? | all tall |
| A capital letter usually symbolizes a __________. | dominant trait |
| If a child has an AB blood type, the parents | can have different blood types, but neither can be blood type O. |
| The theory of independent assortment deals with the alleles governing two different traits. applies only to linked genes. applies only to sex-linked genes. explains the behavior of a pair of alleles during meiosis. | none of these |
| The theory of segregation | explains the behavior of a pair of alleles during meiosis. |
| In Mendel's time, most people believed that | characteristics of parents were blended in offspring |
| Which of the following is represented by a word description, such as black and tall? | phenotype |
| If an organism heterozygous for one trait is crossed with an organism that is homozygous recessive for one trait, the phenotypic ratio of the offspring will be | 2:1 |
| In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). If two dihybrids (Bb Ss) were crossed, what fraction of the black solid offspring would be homozygous? | 1/9 |
| According to Mendel, what kind of genes "disappear" in F1 pea plants? | recessive |
| If R is dominant to r, the offspring of the cross of RR with rr will | display the same phenotype as the RR parent. |
| If short hair (L) is dominant to long hair (l), animals LL and Ll have the same | phenotypes |
| Various forms of a gene at a given locus are called | alleles |
| If a homozygous dominant male rabbit and a homozygous recessive female rabbit for one trait are mated several times and 64 offspring are produced. How many of the offspring are expected to be heterozygous? | 64 |
| The results of a testcross reveal that all offspring resemble the parent being tested. That parent necessarily is | homozygous |
| An organism is said to be _____ if it carries two different alleles for one trait. | heterozygous |
| Second generation offspring from a cross are the ________________. | F2 generation |
| Which of the following represents a dihybrid cross? | AaBb x AaBb |
| The study of the transmission of hereditary information from parents to offspring is called | genetics |
| Genes at one locus that affect the expression of genes at a different locus are said to be | epistatic. |
| Which of the following represents a heterozygous condition? | Aa |
| If an organism heterozygous for one trait is crossed with an organism that is homozygous recessive for one trait, what will be the genotypic ratio of the offspring? | 1:1 |
| Mendel's study of genetics differed from those of his contemporaries because he | kept careful records and analyzed the data statistically. |
| If pairs of factors (genes) separate independently of other pairs of factors (genes), you are dealing with the | law of independent assortment |
| Multiple effects of a single gene is known as | pleiotropy. |
| the location of an allele on a chromosome. | Locus |
| locus | the location of an allele on a chromosome. |
| The color of Siamese cats is controlled by | variation in temperature, with cold temperature producing dark fur. |
| If all offspring of a cross have the genotype Aa, the parents of the crosses would most likely be | AA x aa. |
| Both a man and woman are heterozygous for freckles. Freckles are dominant over no freckles. What are the chances that their child will have freckles? | 3/4 |
| An organism is said to be _______ if it carries two identical alleles for a trait. | homozygous |
| Which organism did Mendel use to work out the laws of segregation and independent assortment? | garden pea |
| If an albino (recessive) woman is married to a man with normal coloring and they have an albino child, what was the genotype of the man? | heterozygous |
| In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). If two dihybrids (Bb Ss) were crossed, the most common phenotype would be | black and solid. |
| In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). In the F2 generation of a cross between BB ss with bb SS, what fraction of the offspring would be expected to be black and spotted? | 3/16 |
| The F1 offspring of the monohybrid cross (AA x aa) are ______________. | all Aa |
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