/10 Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 12345678910 Chapter 4 : Principles of Inheritance and Variation This Quiz Contains a set of 10 Questions. The Passing Cut-off is 60%. To start the Quiz, click on the Start Button. All the Best! 1 / 10 Sex of human child is determined at fertilisation embryonic stage puberty birth 2 / 10 If both parents are carriers of thalassemia, probability of normal child is: 0.25 0.5 0.75 1 3 / 10 A male child is born with an extra X chromosome. His karyotype will be: 47, XXY 45, XO 46, XY 47, XXX 4 / 10 Independent assortment occurs during mitosis metaphase meiosis metaphase I mitosis anaphase meiosis anaphase II 5 / 10 In polygenic inheritance, the phenotype is influenced by single major gene multiple genes with small effects mitochondrial genes Y chromosome genes 6 / 10 A point mutation changing one codon into a stop codon is called: Missense mutation Silent mutation Nonsense mutation Frameshift mutation 7 / 10 A woman has 47 chromosomes including three X. This is: Turner’s syndrome Klinefelter’s syndrome Down’s syndrome Triple X syndrome 8 / 10 Mutation that does not affect phenotype is called: Silent mutation Point mutation Frameshift mutation Missense mutation 9 / 10 Carrier mother × normal father for haemophilia produces: 25% affected sons 50% affected daughters 100% normal 50% affected sons 10 / 10 Human females have sex chromosomes: XY XX XO ZZ Your score is 0% Restart quiz
