Assume that a certain strain of bacteria carries a mutation that causes it to die at 42oC, but grows normally at 30oC. This allele is best described as: conditional lethal that allows survival under restrictive conditions conditional lethal that causes death under restrictive conditions recessive lethal heterogeneous

Assume that a certain strain of bacteria carries a mutation that causes it to die at 42oC, but grows normally at 30oC. This allele is best described as: conditional lethal that allows survival under restrictive conditions conditional lethal that causes death under restrictive conditions recessive lethal heterogeneous

Name: 11. Assume that a certain strain of bacteria carries a mutation that c
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Description: 11. Assume that a certain strain of bacteria carries a mutation that causes it to die at 42oC, but grows normally at 30oC. This allele is best described as: conditional lethal that allows survival under restrictive conditions conditional lethal that

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter13: Modern Understandings Of Inheritance

Section: Chapter Questions

Problem 2VCQ: Figure 13.4 Which of the following statements is true? Recombination of the body color and red/...

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1. A new species of animal called the rekamriliob has been found in the wild. The lab you work in has been tasked with studying its genetics. So far, there have been 2 main phenotypes found in the wild. Through selective breeding, your lab has determined that the gene for purple color (P) is dominant to the gene for golden color (p). Another lab has determined that the thick limb trait is dominant to the thin limb variety. If you breed a purebred purple thick limbed rekamreliob male with a golden thin limbed female, you get 100% thick limed offspring that are purple in color. If you take two of these organisms and breed them together, please predict the following. Assume that rekameliobs lay an average of 32 eggs. The gametes produced if the genes are unlinked b. genes The expected numbers of the possible phenotype in the offspring with unlinked The gametes produced if the genes are linked (list all possibilities, and show which ones are the result of crossing over) d. List the…
19.Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene—an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). The allele for long eyelashes is dominant (L) and the allele for short eyelashes is recessive (l). An individual who is heterozygous for eyelash length would produce which of the following gametes? A. None of the gametes would have the eyelash gene; gametes do not have eyelashes. B. The proportion of gametes receiving each allele would be random; the process of meiosis is very disorganized and chromosomes are not separated in an ordered fashion. C. All gametes would have the l allele. D. Half of the gametes would have the L allele and half of the gametes would have the l allele.
3. An F* strain, marked at 10 loci, gives rise spontaneously to Hfr progeny whenever the F factor becomes incorporated into the chromosome of the F* strain. The F factor can integrate into the circular chromosome at many points, so that the resulting Hfr strains transfer the genetic markers in different orders. For any Hfr strain, the order of markers entering a recipient cell can be determined by interrupted mating experiments. From the following data for several Hfr strains derived from the same F* strain, determine the order of markers in the F* strain. ww wwww Hfr Strain Markers Donated in Order 1 -Z-H-E-R> – 0-K-S-R –> – K-O-W-I > – Z-T-I-W > 4 – H-Z-T-I>
16. If at a bi-allelic genomic locus, there are two alleles A, and C, such that A can mutate into C with a probability 1x10+ in every generation, and a population hasA alleles at frequency 0.4, what would be the frequency of the (a) A allele after one generation of mutation? (b) the C allele after two generations of mutation?
4. Allele specific oligo-nucleotide hybridization is a genetic test used to look for single nucleotide polymorphisms (SNPS) associated with genetic diseases. It uses short sequences of labeled DNA as probes to bind onto either the normal allele or mutated allele in a patient's sample. Given that hemocystinuria is an autosomal recessive disease, use the results from the ASOH test below to determine the GENOTYPE and PHENOTYPE of the newborns born at Henry Mayo Hospital this week. Luis Mina Emma Elias Genotype Phenotype Allele H probe Allele h probe Luis Mina Emma Elias
5.Suppose that the same recessive daf-d mutation in the N2 strain landed 20m.u. from the SNP367 locus. You cross homozygous daf-d/daf-d N2 worms to wild type HW worms, and let the hybrid F1 make gametes. How many of the gametes produced by the F1 hybrids will carry a daf-d allele and the N2 allele of SNP367 ? And how many of the gametes will carry a daf-d allele and the HW allele of SNP367? a.40% ; 10% b.20% ; 80% c.50% ; 50% d.80% ; 20% e.10% ; 40%
5. Construct a gene map given the following information. Which two genes are most likely going to be inherited together? Genes Crossover Frequency A & C A & D 8% 10% B & D 14% B & F 8% C & D 2% C & F 8% D & F 6%
4. When the F1 bees were backcrossed to the inbred resistant line produced 4 types of offspring in equal numbers: ¼ if the back-cross offspring showed the complete hygienic behavior pattern¼ of the back-cross offspring showed none of the elements of hygienic behavior¼ of the back-cross offspring would uncap the cells of the diseased larvae but these workers would not remove the diseased larvae¼ of the back-cross offspring would remove the diseased larvae (once the experimenter had uncapped the cells of the diseased larvae) a. If the resistant behavioral pattern is due to two gene loci with two alleles each, can this account for the 4 phenotypes shown in the back-cross? How? b. If you use UURR (for the non-resistant inbred line) and uurr (for the resistant inbred line), what are the phenotypic and genotypic ratios for the F2 cross between these lines (i.e., F1 x F1)? Show your work: c. Given the genetic model given in part d, do the backcross offspring in part c (from an F1 x resistant…
4. Normal yeast cells can survive on a diet of sugars, a few simple salts and one vitamin. They can make all of their amino acids and other vitamins using what can be found in their diet. You identify a mutant strain that can only survive if given alanine, which is one of the amino acids. The mutation is recessive. Based on this information, what would you predict that the normal function of the dominant allele is?
Activity 1 Write down the correct biological term for each of the following descriptions in the space provided. DESCRIPTION TERM 1.1 A cross involving a single characteristic 1.2 A cross involving two characteristics A representation that traces the transmission of a characteristic over many generations of a family Allele that influences the phenotype only when in the homozygous combination but not in the heterozygous condition 1.3 1.4 1.5 Allele that influences the phenotype whether in the homozygous or heterozygous combination 1.6 Alternative forms of a gene found at the same locus 1.7 Characteristics controlled by alleles of a gene that are located on the sex chromosomes Cross involving alleles of a gene that are equally dominant, leading to a third phenotype which is a combination of the other two phenotypes 1.8 1.9 Cross involving alleles that are neither dominant or recessive, leading to an intermediate phenotype 1.10 Cross involving characteristics controlled by dominant and…
5. The gene controlling the human ABO blood group system has three alleles that determine the nature of the antigens on the membranes of red cells. Allele lª codes for the production of antigen A on the surface of red blood cells. Allele IB codes for the production of antigen B on the surface of red blood cells. Allele lº does not code for any antigens on the surface of red blood cells. Alleles IA and IB are co-dominant and both alleles are dominant over lº a. Use this information to determine the possible genotypes, antigens and blood group phenotypes within a population. Genotype Antigen(s) Blood Group Phenotype
25., Snow geese (Chen caerulescens) come in two color types, white “snows” and “blues” with dark bodies. A single gene controls coloration, where the dark (“blue”) allele (D) is dominant. A population of 30,012 geese includes 9236 dark individuals. Genetic testing reveals that 7636 of the 9236 dark individuals are heterozygous (Dd). How many individuals are dd? 7636 13140 1600 20776

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	conditional lethal that allows survival under restrictive conditions
	conditional lethal that causes death under restrictive conditions
	recessive lethal
	heterogeneous