This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Penetrance and Expressivity”. 1. An individual with a homozygous genotype for a particular phenotype ____________ expresses the phenotype. a) Always b) Never c) Sometimes d) Unknown relation 2. It is known that homozygous dominant gene for a type of cone gives brown colour. … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Lethal Alleles”. 1. Lethal alleles can only be recessive. a) True b) False 2. In Aurea, a type of snapdragon, only ______________ carrying dominant genes live. a) Homozygous b) Homozygote c) Heterozygote d) Heterozygous 3. The ______________ mouse is lethal. a) Homozygous white … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Duplicate Epistasis”. 1. Flower colour in sweet pea shows duplicate epistasis, if purple colour is dominant what is the F2 ratio? a) 15:1 b) 9:7 c) 3:1 d) 9:3:4 2. Which of the following condition in recessive duplicate epistasis will give the odd … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Epistasis”. 1. In case of two gene interaction, the gene which is masking the expression of another is called_____________ and the gene whose expression is masked is called_______________ a) Dominant, recessive b) Recessive, dominant c) Epistatic, hypostatic d) Hypostatic, Epistatic 2. Epistasis is … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Gene Interactions”. 1. The difference in epistasis and gene interaction is ___________________ a) Gene interaction involves two genes b) Epistasis modifies the normal Mendelian ratio c) Epistasis involves two genes d) Gene interaction produces a novel phenotype 2. Gene interaction always modifies the … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Multiple Alleles”. 1. If there are multiple alleles for a gene which of the following is true? a) All the alleles same expressed at the same time b) Among the multiple copies resent only the most dominant one is expressed c) Only two … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Incomplete Dominance and Codominance”. 1. In incomplete dominance__________________ a) Phenotype of both allele is expressed b) Phenotype of only one allele is expressed c) Phenotype of neither of the alleles are expressed d) Phenotype of both allele is partially expressed 2. Codominance and … Read more
This set of Tough Cytogenetics Questions and Answers focuses on “Sex Influenced Traits and Sex Limited Traits”. 1. The sex influenced traits are present in _______________________ a) Autosome b) Sex chromosome c) Mitochondrial chromosome d) These are epigenetic traits 2. Sex influenced traits are only related to females. a) True b) False 3. If A … Read more
This set of Cytogenetics online quiz focuses on “Dosage Compensation Mechanism for X linked Genes”. 1. Both Drosophila and mammals have XY system of sex determination. Dosage compensation y inactivation of one X chromosome is seen in ___________________ a) Mammals b) Drosophila c) Metaphase d) Telophase 2. Barr bodies are found ________________ a) In the … Read more
This set of Cytogenetics Multiple Choice Questions & Answers (MCQs) focuses on “Sex Linked Inheritance”. 1. All genes in sex chromosomes are sex linked. a) True b) False 2. An X linked recessive gene would appear to __________________ a) Be expressed in both males and females equally b) Skip generations c) Be lethal d) Gradually … Read more
