DNA/Genetics Test 2016

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1 N/Genetics Test 2016 Name: ate: 1. Genetic information usually flows in one specific direction. Which of the following best represents this flow?. N Protein RN. Protein RN N. RN Protein N. N RN Protein 3. Garden pea plants can have yellow seeds or green seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele for green seeds. Which of the following terms best describes the allele for yellow seeds?. codominant. dominant. recessive. sex-linked 4. The diagram below represents a cross between two pea plants. 2. If Jessica has light eyes (bb) and both of her parents have dark eyes (b) which statement is true?. Jessica inherited both genes her father.. Jessica inherited both genes her mother.. Jessica inherited one recessive form of the gene each parent.. Jessica inherited one dominant form of the gene each parent. In pea plants, the allele for round seeds (R) is dominant to the allele for oval seeds (r). In a cross between the two plants above, what percentage of the offspring will have round seeds?. 100%. 75%. 50%. 25% page 1

2 5. In pigeons, the allele for normal feathers (F) is dominant to the allele for frizzy feathers (f). 7. In carrier pigeons there is a rare inherited condition that causes the death of the chicks before hatching. In order for this disease to be passed generation to generation there must be parent birds that. are heterozygous for the disease.. have the disease themselves. If a purebred, normal-feathered bird (FF) is crossed with a frizzy-feathered bird (ff), how many different feather phenotypes are possible in the offspring?. produce new mutations for this disease.. are closely interbred The diagram below shows the procedure scientists used to clone a frog the nucleus of a skin cell. 6. Which of the following best describes the inheritance of a sex-linked trait?. a recessive allele carried by females that affects only males. a dominant allele carried by females that affects only males. an allele carried on the Y chromosome that can affect both males and females. an allele carried on an X chromosome that can affect males or females The tadpole produced by the cloning process will be genetically.. most similar to the frog the egg cell came. most similar to the frog the skin cell came. different both frogs that the cells came. identical to both frogs that the cells came page 2 N/Genetics Test 2016

3 9. Which factor determines the color of a person s eyes?. Whether the person s eye ceiis are diploid or haploid. The type of proteins produced by the person s eye cells. Whether the person s eye cells undergo mitosis or meiosis. The number of chromosomes in each of the person s eye cells 12. Hemophilia is an X-linked recessive trait. In a family, the father is unaffected and the mother carries only one recessive allele. Which outcome is expected for their offspring?. ll of the male offspring would be affected,. Half of the male offspring would be affected.. ll of the female offspring would be affected.. Half of the female offspring would be affected. 10. uring N replication, the wrong nucleotide was inserted in the N sequence. Which of the following terms describes this situation?. mutation. regeneration. transcription. translation 13. Which of the following is an example of codominance in genetic traits?. tall pea plant and a short pea plant produce tall pea plants.. n orange cat and a black cat produce an orange-and-black kitten.. blue-eyed man and a brown-eyed woman produce a blue-eyed child.. color-blind woman and a man with normal vision produce a color-blind son. 11. portion of one strand of a N molecule has the sequence shown below. TGGG ssuming there are no mutations in this portion of the N, what is the corresponding sequence on the complementary N strand?. TGGG. GTTGG. TGGTT. UGGUU 14. Which of the following terms applies to traits, such as human eye color, that are controlled by more than one gene?. codominant. polygenic. recessive. sex-linked page 3 N/Genetics Test 2016

4 15. The illustration below shows two adult rabbits and their offspring. 18. In humans the trait of having freckles (F) is dominant to not having freckles (f). Which genotype and phenotype are correctly paired?. FF-no freckles. Ff-no freckles. Ff-freckles. ff-freckles In rabbits, the allele for spots (R) is dominant to the allele for solid color (r). What is the most likely genotype of the parent rabbits in the illustration?. rr rr. Rr rr. Rr Rr. RR rr 19. What causes a person to have blue eyes?. eating foods high in protein at a young age 16. What molecules do both N and RN contain?. uracil. thymine. nucleotides. deoxyribose. having a brother or sister with blue eyes. being overexposed to the Sun at a young age. receiving a gene for blue eyes each parent 17. Use the information below to answer the following question(s). pair of laboratory mice are crossed to obtain offspring. Three alleles found in the female gamete are. Three alleles found in the male gamete are bc. Which of these is a possible combination of alleles for the offspring produced by these mice? 20. If a breeder wanted to figure out whether a black rabbit was homozygous () or heterozygous (b) for coat color, which of the following rabbit genotypes would be crossed with the black rabbit?.. b. bb. bb. abc.. aabbcc. bc page 4 N/Genetics Test 2016

5 21. 5 TGGTGG 3 The above sequence of N is part of a gene. How many amino acids are coded for by this segment? Which of these would most likely cause a mutation?. the placement of ribosomes on the endoplasmic reticulum. the insertion of a nucleotide into N. the movement of transfer RN out of the nucleus. the release of messenger RN N N contains the code for constructing which molecules?. proteins. fats. starches. sugars strand of mrn containing the repeating sequence GGGG could code for which of the following amino acid sequences?. lys arg glu lys. ser ser glu glu. lys arg lys arg. lys lys lys lys 25. Which of the following best describes the result of a mutation in an organism s N?. The mutation may produce a zygote.. The mutation may cause phenotypic change.. The mutation causes damage when it occurs.. The mutation creates entirely new organisms. page 5 N/Genetics Test 2016

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