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An organism’s genotype is the number of different alleles for a particular trait present in it, whereas
Answer to Problem 1MC
Correct answer:
The physical position of a gene on a chromosome is its locus; slightly different forms of a gene are called alleles. Therefore, option (a) is correct.
Option (a) is given as “locus; alleles”.
Explanation of Solution
Justify reason for the correct statement:
An allele is any of the alternative forms of a gene that may occur at a specific locus and the combination of alleles for a genotype of an organism for expression of a particular phenotype.
Hence, option (a) is correct.
Justify reasons for the incorrect statements:
Option (b) is given as “locus; polygenic”.
The particular location of any gene in the genome is termed as locus and polygenic is an inheritance pattern of a trait that is controlled by the two or more genes. Hence, it is a wrong answer.
Option (c) is given as “chiasma; alleles”.
Alleles are responsible for any particular trait in any organism and chiasma is the site where chromosomes come in contact with each other during crossing over. Hence, it is a wrong answer.
Option (d) is given as “trait and hybrids”.
Traits are the characters carried by any individual, and hybrids contain two alleles for the same trait. Hence, it is a wrong answer.
Hence, options (b), (c), and (d) are incorrect.
Locus provides a physical position to a gene on the chromosome, whereas alleles are the different form of a particular gene.
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Chapter 11 Solutions
Biology
- is a segment of DNA whose sequence of nucleotides codes for a 7. A protein. a. gene b. chromosome c. karyotype d. characteristic 8. A Is a graphic display of chromosomes, arranged by size and shape. a. genotype b. phenotype C. monotype d. karyotype 9. In purple people eaters, one-horn is dominant and no horns is recessive. Draw a Punnett Square showing the cross of a purple people eater that is heterozygous for horns with a purple people eater that does not have horns. Summarize the genotypes & phenotypes of the possible offspring. 10. Blood typing: a. The father of a child has type AB blood. The mother has type A. Which blood types can their children NOT have? b. A woman with type A blood and a man with type B blood could potentially have offspring with what blood types? c. The mother has type A blood. Her husband has type B blood. Their child has type O blood. The father claims the child can't be his. Is he right?arrow_forwardGregor mendels experiments sought to discover if he could find the rules that govern A. Genetics B. Heredity C. Meiosis D. Mutationsarrow_forwardA recognized set of symptoms that characterize a genetic disorder is a(n)______ . a. syndrome c. abnormality b. disease d. inheritance patternarrow_forward
- Similarities in________ are the basis of similarities in traits. a. karyotype c. the double helix b. DNA sequence d. chromosome numbearrow_forwardAn individual with two different alleles at a locus is a(n) Group of answer choices A. clone B. hemizygote C. homozygote D.heterozygotearrow_forwardThis example can be considered as ______________. A.Modifier gene B.Gene redundancy C.Co-dominance D.Incomplete dominancearrow_forward
- Maple syrup urine disease is an autosomal recessive gene. The R allele leads to a normal protein product, whereas r leads to a mutant protein. Which genotype below will display the Maple syrup urine disease phenotype? A. Rr B. RR C. rr D. Rr and rrarrow_forwardIn agriculture, polyploid crops (like coffee, strawberries, or bananas) tend to produce ________. a. more uniformity b. more variety c. larger yields d. smaller yieldsarrow_forwardWhich of the following is a phenotype? a. Aa b. red hair c. Heterozygous d. DNAarrow_forward
- Red-green color blindness is a recessive trait in humans. The locus is on the X chromosome. If a color blind woman marries a normal vision man, what kind of children could they have? Group of answer choices A. color blind daughters, normal vision sons B. color blind sons, normal vision daughters C. all color blind D. all normal visionarrow_forwardPhenotype is the allele combinations of an individual that cause traits or diseases. Genotype is the expression of a gene in traits or symptoms. A. Both statements are correct B. Both statements are incorrect C. First statement is Correct, Second is Incorrect D. First statement is Incorrect, Second is Correctarrow_forwardA test cross is performed to determine if a specific individual is a carrier. The results generate a 50/50 ratio of phenotypes. The test subject is therefore ________. A. Unable to reproduce B. Homozygous recessive C. Not following the rules of Mendelian genetics D. Homozygous dominant E. Heterozygousarrow_forward
