Genetics

Fur color in a species of mouse is controlled by a single gene pair. BB animals are black and bb animals are while. Bb animals exhibit grey fur. What type of interaction is shown by the two alleles in the heterozyous animals. incomplete dominance What is penetrance? the percentage of individuals having a particular genotype who express the expected genotype. In chickens, the dominant phenotype, Cr, produces the creeper phenotype. The creeper allele is lethal in the homozygous condition. The ...

Ploidy refers to the number of sets of chromosomes found in an organism. Most multicellular organisms are _____(2n) Diploid The physical outcome, or trait, that results from gene expression is a genotype. (T/F) False What term is used for a variety that passes a trait onto all its offspring when crossed to a similar variety? -Self-fertile -Cross-fertile -True-breeding -Dominant True Breeding Which characteristics are true of complex traits? Select all that apply. -complex traits exhib...

1:2:1 what will be the genotypic ratio in the offspring of two Aa parents that are crossed with each other? the allele for round seeds is dominant to the allele for wrinkled seeds when Mendel crossed a plant homozygous for round seeds to another plant homozygous for wrinkled seeds, he found that the progeny had round seeds. how is this explained? how well the observed results of a genetic cross fit the expected values what information can the chi-square goodness-of-fit test provide? 2 the...

Which of the following DNA molecules is identical to this one? 3'-TACGGTAA-5' 3'-TACGGTAA-5' Which of the following DNA molecules would bond (complimentary) with the one shown here: 5'-GGGATCGGG-3' 5'-CCCGATCCC-3' How many hydrogen bonds hold these two DNA strands together? 5'-GAATTAAA-3' 3'-CTTAATTT-5' 17 What holds deoxyribonucleotides together to form a single-stranded DNA molecule? covalent bonds between sugar and phosphate T/F: Sister ch...

C What characteristic is not necessary for a molecule that is the genetic material? A. It must contain complex information B. It must be variable C. It must perform the action associated with the phenotype D. It must have the ability to replicate faithfully E. It must encode the phenotype A and C A key discovery leading to the structure of DNA was done by Chargaff. He found that ____________ (2) A. The amount of A equals the amount of T, and the amount of G equals the amount of C B. Th...

albinism, lack of pigmentation in humans, results from an autosomal recessive gene (a). two parents with normal pigmentation have an albino child. what is the probability that their next three children will be an albino? 1/64 - Aa x Aa will results in 1/4 possibility of albinism. for the probability of three children to have it you multiply 1/4 to itself three times. the genotypes of husband and wife are I^A and I^B. among the blood types of their children, how many different genotypes and ph...

Phenyketonuria is an inborn error of metabolism caused by an autosomal recessive gene. The frequency of this allele in the population is 0.03. Assuming Hardy-Weinberg equilibrium, what is the expected incidence of phenyketonuria among the offspring of all matings in which both parents are found to be carriers? A. 0.0009 B. 0.03 C. 0.25 D. 0.5 C The MN blood group phenotypes of 2,000 British citizens were 596M, 978MN, and 426N. What is the frequency of the NN genotype? A. 0.106 B. 0.1...

The Beadle and Tatum experiments were based on all of the following assumptions except that _______. two strains of auxotrophic Neurospora that grow on minimal medium supplemented with biotin have mutations in the same gene In their first round of screening, Beadle and Tatum plated spores on minimal medium. The purpose of this screen was to _______. determine whether any auxotrophic mutants had been generated Which of the following can be inferred from the Beadle and Tatum experiments? For ...

genome The complete set of genetic instructions for an organism is its ___ population ______ genetics is the division that is essentially a study of evolution model A long generation time is not a useful characteristic for a ___ genetic organism heredity The domestication of plants and animals is the evidence for early understanding of the principles of ____ Mendel ______ discovered the basic principles of heredity Inheritance of acquired characteristics ___ ____ ___ ___ is the concep...

The inheritance of both copies of a homologous chromosome pair from one parent is know as A. Fragile sites B. Nondisjunction C. Uniparental disomy D. Copy number variants E. Chromosomal breakage C Because Marfan Syndrome is an autosomal dominant disorder A.All affected individuals must be homozygous dominant B. Both parents must have Marfan Syndrome in order to have a child with the condition C. Affected individuals are typically short in stature and have usually strong connective tiss...

Xeroderma pigmentosum is due to a defective ___. a. Oncogene b. Tumor suppressor gene c. DNA repair mechanism DNA repair mechanism Cervical cancer is associated with a. Epstein-Barr Virus b. HIV c. HPV d. Hepatitis B virus e. Hepatitis A virus HPV Transcriptionally acive DNA is _______ tightly coiled than DNA that is not being transcribed. a. Less b. More Less A population was scored for the MN blood type locus. There were 78 Type M, 458 Type MN, and 155 Type N individuals in the...

_______ was founded in the 1970s to address moral issues and controversies that arise in applying medical technology bioethics a trait of disorder that is multifactorial is Caused by one or more gene plus environmental influences one way to study the human genome is to determine to DNA sequence Nacho suffers from terrible migraine headaches. He enters a clinical trial to test whether certain single nucleotide polymorphisms (SNPs) are associated with response to one drug but not another. Th...

What is the molecular mechanism for imprinting a gene? a. acetylation b. methylation c. phosphorylation d. mutation e. nitration B Genomic imprinting most commonly uses____ to ____genes. Select one: a. acetylation : activate b. methylation : activate c. phosphorylation : activate d. methylation : deactivate e. phosphorylation : deactivate D Individuals with three copies of most autosomes do not survive. Individuals with an extra X chromosome, however, survive with relatively mild ...

Gregor Mendel an Austrian monk who worked with pea plants to create the foundation of modern genetics Mendel's experiment results/laws found out/discovered: principle of dominance, segregation, true-breeding, Punnett square (Chapter 11-Sec 1) principle of dominance states that some alleles are dominant and some are recessive genetics the science of heredity, dealing with genes and how they act in an organism heredity the transmission of genetic characteristics from parents to offspri...

What early concept of heredity proposed that genetic information in the form of particles called gemmules travels from different parts of the body to reproductive organs? Pangenesis What are the multiple forms of one gene called? Alleles What is the evidence for early understanding and application of the principles of heredity? the domestication of plants and animals What is the complete set of genetic instructions for an organism? its genome Who discovered the basic principles of heredi...

Expected Phenotype ratio of dihybrid cross 9:3:3:1 Flower color in a plant you are studying is produced through a series of enzymatic reactions. In one step, controlled by the P locus, a yellow pigment is altered to be pink. There is a recessive p allele at that locus and the yellow-to-pink alteration is not made. Individuals with the pp genotype have yellow flowers. In the next step, controlled by the R locus, the dominant trait modifies the pink pigment to be a deep red. If you perform a ...

1. True (mark A) or false (mark B): Both animals and plants are eukaryotes. A 2. Animals are _______. a. Prokaryotic b.Eukaryotic c.Neither eukaryotic nor prokaryotic d.Both eukaryotic and prokaryotic B 3.Most animals are primarily composed of __________. a.Haploid cells b.Somatic cells c.Gametes B 4.A genome is ___________. SG1 #5 a.The information needed to make a single protein b.The total collection of proteins needed to make an organism c.A chromosome d.The total collection...

The preinitiation complex forms in bacteria when the start codon is recognized through binding of 16srRNA and what region of mRNA? a. Shine-Delgarno sequence b. Kozak sequence c. 5'-UTR d. Poly-Adenylation site e. CATAAT a. Shine-Delgarno sequence During translation initiation in eukaryotes, the amino acid on the initiator tRNA is: a. Acetylated methionine (aMet) b. added using ATP as the energy source c. methionine (Met) d. IF-1 e. N-formylmethionine (fMet) c. methionine (Me...

The punnett square shows that the gene for pea shape and and the gene for pea color are linked The principles of probability can be used to predict the traits of the offspring produced by genetic crosses A punnett square shows all the following except the actual results of a genetic cross In the P generation, a yellow pea plant was crossed with a green pea plant. If alleles did not segregate during gamete formation all of the F1 plants would be green Gregor Mendel's principles of gene...

Discuss the concepts of homologous chromosomes, diploidy, and haploidy. What characteristics do two homologous chromosomes share? Homologous chromosomes are similar, but not identical. One comes from mom and one from dad. They carry genes for the same inherited characteristic, may of which carry different versions of the same gene. Two homologous chromosomes share position of the centromere, type/location of genes, and length/shape. Diploidy- means that both members of a homologous pair are pre...