NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Polygenic Inheritance Multiple Choice Questions
MCQs on Polygenic Inheritance :
1. In corolla length of Nicotiana longiflora, polygenic inheritance was studied by
(a) Joseph Kolreuter
(b) E.M. East
(c) Francis Galton
(d) Nilsson-Ehle
Answer
Answer: (b)
2. Marriages between close relatives should be avoided as it causes more
(a) Abnormalities in child birth
(b) Mutations
(c) Recessive alleles to come together
(d) Multiple births
Answer
Answer: (c)
3. When two or more nonallelic gene pairs affect the same character in the same way, it is called
(a) pleiotropy
(b) polygenic inheritance
(c) additive expressivity
(d) total penetrance
Answer
Answer: (b)
4. Polygenes exhibit
(a) Different phenotypes
(b) Different genotypes
(c) Similar genotypes and phenotypes
(d) Both (a) and (b)
Answer
Answer: (a)
5. Raju and Rani are planning a family, but sas each has a brother having the sickle-cell disorder, they are worried that their kids might develop the disorder too. Neither Raju, Rani nor their respective parents have the disorder. They decide to consult a genetic counsellor who conveys them this
(a) its is possible that none of their kids will have the disorder, but blood tests on both of them should be carried out to confirm
(b) all of their children will have sickle-cell disorder
(c) one of four of their children can be expected to have sickle cell
(d) there is no chance of any of their kids having sickle cell
Answer
Answer: (a)
6. Traits which exhibit continuous phenotypic variation are typically determined by this inheritance form
(a) incomplete dominance
(b) polygene inheritance
(c) multiple-allele inheritance
(d) sex-linked inheritance
Answer
Answer: (b)
7. One of the X chromosomes in females is inactivated by
(a) environmental factors
(b) enzymes coded for by mitochondrial DNA
(c) number of dominant genes found on each X chromosome
(d) epigenetic markers
Answer
Answer: (d)
8. Pick the correct statement
(a) Pleiotropic genes exhibit single phenotype
(b) Pleiotropy is caused by a gene that has multiple phenotypic effect
(c) Lethal genes causes the appearance of ancestral characters
(d) Sickle cell anemia is an example of multifactorial inheritance
Answer
Answer: (b)
9. Which of these illustrates pleiotropy?
(a) Matings between earless sheep and long eared sheep always result in short eared offspring
(b) Human cystic fibrosis causes many symptoms from respiratory distress to digestive problems
(c) Wheat kerneis can range from white to red in color, a trait governed by multiple genes
(d) The genes for scarlet eyes and hairy body in fruit flies are located on the same chromosome
Answer
Answer: (b)
10. Morphan’s syndrome is as a result of
(a) Polygene
(b) Pseudogene
(c) Modifier gene
(d) Pleiotropic gene
Answer
Answer: (d)