Genetics Test Study Guide Graded A

Genetics Test Study Guide Graded A+ Which of the following influences a phenotype? A. always genotype alone B. always genotype and environment C. always environment alone D. sometimes genotype and environment Use the picture to answer the question. ......... (Parents) ......Bb........... Bb .........BB Bb bB bb ........... (Children) Bb = Brown-eyed BB = Brown-eyed bb = Blue-eyed bB = Brown-eyed A cross between two brown eyed parents is shown above. Which statement BEST explains why blue eyes appear only in 25% of offspring? A. It is a mutated trait. B. It is a recessive trait. C. It is a dominant trait. D. It is an acquired trait. Of sixteen rabbits just born, thirteen have brown fur and three have white fur. The trait for white fur is considered to be ______________. A. recessive B. bossy C. stronger D. dominant Who is the Austrian monk whose work with pea plants helped him come up with a theory of heredity? A. Gregor Mendel B. Charles Darwin C. Robert Hooke D. Rudolph Virchow Which term correctly describes an individual with a pair of the same alleles for a trait? A. homologus B. heterologus C. homozygous D. heterozygous Which of these terms describes the genetic information that is passed from parents to offspring? A. genotype B. phenotype C. phenocopy D. trait Look at the Punnett square. .......A ...........a a .....Aa .......aa a .....Aa ........aa If the two parents represented in the Punnett square have four offspring, what does the Punnett square tells you? A. Two of the offspring will definitely have the genotype Aa. B. It is more likely that two of them will have the genotype Aa than the genotype aa. C. There is a 50% chance for each of the four offspring to have the genotype Aa. D. It is less likely that two of them will have the genotype Aa than the genotype aa. What are the possible genotypes of the offspring represented in this Punnett square? .......A ...........a a .....Aa .......aa a .....Aa ........aa A. AA and aa B. AA and Aa C. Aa and Aa D. Aa and aa An individual with two different alleles for a specific trait is said to be: A. homozygous B. heterozygous C. homogeneous D. heterogeneous Genes have different versions. Which term is the name of a gene's version? A. genotype B. phenotype C. phenocopy D. allele When two parents contribute genetic material to their offspring, ________________. A) sometimes the male contributes more than the female, and sometimes the female contributes more than the male B) the female contributes more than the male C) the male contributes more than the female D) the male and female each contribute the same amount P................ P p p The Punnett square above shows a cross between a purple flower and a white flower. What percentage of offspring from this cross will have the genotype Pp? A) 100% B) 50% C) 25% D) 0% Gregor Mendel worked with inheritance patterns in pea plants. He is credited with which theory? A. The theory of relativity. B. The theory of natural selection. C. The theory of gravity. D. The theory of heredity. From a cross between a short haired guinea pig (hh) and a long haired guinea pig (Hh), what would be the possible phenotypes of the offspring? A. 100% will have long hair . B. 75% will have long hair, 25% short hair. C. 50% will have long hair, 50% short hair. D. 25% will have long hair, 75% short hair. Gregor Mendel was A. an English scientist who worked closely with Darwin B. a central European monk C. an early 20th century Dutch biologist who carried out genetics research D. an English physicist Which of the following statements is true about Mendel? A. His discoveries concerning genetic inheritance were generally accepted by the scientific community when he published them B. He believed that genetic traits of parents will usually blend in their children. C. His ideas about genetics apply equally to plants and animals. An allele is a A. another word for a gene B. a homozygous genotype C. a heterozygous genotype D. one of several possible forms of a gene Phenotype refers to the _________ of an individual A. genetic makeup B. actual physical appearance C. recessive alleles D. dominant alleles When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ______________ allele. A. dominant B. recessive C. both D. neither An organism that has two identical genes for a trait is said to be A. heterozygous for the trait B. hybrid for the trait C. homozygous for the trait D. incompletely dominant for the trait Heredity information for traits is located in A. genes found on chromosomes B. chromosomes found on genes C. the mitochondria D. the lysosomes in the cytoplasm Which of these would best be described as a phenotype? A. Bb B. Pp C. Brown hair D. Mutation Given the following situation, if a person has brown hair with a genotype of Bb, where big B is brown hair and little b is blond hair, which is the dominant gene? A. B B. b C. Neither D. not enough information to determine What is Down's syndrome an example of? A. chromosome disorder B. genetic engineering C. mutation D. disease Given the following situation, if a person has red hair with a genotype of Bb, where big B is red hair and little b is blond hair, which is the recessive gene? A. B B. b C. Neither D. not enough information to determine A _______________________ is a graphical way of determining all the possible genetic outcomes when a cross is performed. In essence, it is a probability box that shows the odds of each possible trait happening. A. mutation B. Punnette Square C. Genetic enginerring D. Allele A _____________________________ is a genealogical table, chart, list, or record, especially of a purebred animal. A. mutation B. Punnette Square C. Genetic enginerring D. Pedigree