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Pheromones, Sex attracta..



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Q1. Which of the following is true for a genic mode of sex determination?

(a) It is seen in higher eukaryotes
(b) Gene locus determines gender
(c) XX will always give female in this case
(d) It makes use of parthenogenesis for producing male offspring

Q2. Parthenogenesis can also take place in human beings.

(a) True
(b) False
(c) -
(d) -

Q3. In bees the males are produced by _________

(a) Mitosis and then fertilization
(b) Meiosis and then fertilization
(c) Mitosis but no fertilization
(d) Meiosis but no fertilizaton

Q4. Genic system of sex determination is seen in _______________

(a) Yeast
(b) Fishes
(c) Reptiles
(d) Mammals

Q5. In ZZ/ZW system if there is a recessive Z allele carrying a distinct phenotype, it will have greater probability of expression in ____________

(a) Male
(b) Female
(c) Recessive genes will not be expressed
(d) Both genders equally

Q6. In ZZ/ZW system which of the following is true?

(a) All organisms have ZZ chromosome
(b) The chromosomes are shaped like Z
(c) Females have ZW constitution
(d) Male is heterozygous

Q7. We will see ZZ/ZW system in chicken; state true or false.

(a) True
(b) False
(c) -
(d) -

Q8. In XO system a male has a mother but not a _____________

(a) Grand father
(b) Father
(c) Grand mother
(d) Sibling

Q9. In case of XO system if an organism has AA+XO it will be a _______

(a) Male
(b) Neuter
(c) Female
(d) Bisexual

Q10. The XO system of sex determination is found in ______________

(a) Insects
(b) Birds
(c) Reptiles
(d) Mammals


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