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Quiz 172
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3421. Causative agent of a sexually transmitted disease that affects mucus membrane of urinogenital tract is:
Staphylococcus aures
Neisseria gonorrhea
Treponema Pallidum
Escherichia coli
3422. Transmission of Neisseria gonorrhoea is best described by which one of the following?
Oro-fecal route
unsafe sex
Vector borne
Droplet infection
3423. AIDS is caused by:
Bacteria
Virus
fungi
Alga
3424. Syphilis is caused by:
Spirochete
Nostoc
Water blooms
Cyano bacteria
3425. Major source of transmission of syphilis is:
Blood transfusion
Insect bite
contaminated water
sexual contact
3426. Which of the following diseases is sexually transmitted?
Tuberculosis
AIDS
Dengue fever
Cholera
3427. The incubation period of syphilis is:
1-2 weeks
2-3 weeks
3-4 weeks
07 days
3428. --------- is spread through sexual contact:
Gonorrhoea
Influenza
Tuberculosis
Typhoid
3429. In males, the sex-determining gene is:
XY
SRY
SYX
SXX
3430. Self-fertilization of F1 dihybrids, following independent assortment of alleles, results in:
3/16 Tall-round : 3/16 dwarf-wrinkled
9/16 tall wrinkled : 3/16 dwarf-round
9/16 tall round : 3/16 dwarf-wrinkled
3/16 tall wrinkled : 3/16 dwarf-round
3431. As a result of cross-fertilization of a true-breeding pea plant having purple-colored flowers with that of white-colored flowers, the offspring will have flowers with:
1/4 purple : 3/4 white
All white
1/4 white : 3/4 purple
All purple
3432. A person was married to his cousin, and both are heterozygous for sickle cell anemia. Among their four kids, what will be the proportion of affected homozygotes?
50%
25%
75%
100%
3433. Test cross is made to check the genotype of a trait. Which of the following crosses is a test cross?
Unknown x At
Unknown x tt
Unknown x AB
Unknown x TT
3434. DNA stores biological information in discrete units termed as:
Genes
Phenotypes
Karyotypes
Cells
3435. According to Mendel's Law of Segregation, the one individual out of four in the F2 generation had a phenotype that failed to express in the generation.
F1
F3
F2
P1
3436. Test cross is made to check the genotype of a trait. Which of the following crosses is a test cross?
Unknown x At
Unknown x AB
Unknown x tt
Unknown x TT
3437. The change in frequency of alleles at a locus that occurs by chance is known as:
Mutation
Genetic drift
Non-random mating
Speciation
3438. Which of the following statements about natural selection is not true?
It affects variations that are heritable
It is selected by a breeder
It can improve the adaptation of species
It is regional in nature
3439. The idea of inheritance of acquired characteristics was presented by:
Jean Baptist Lamarck
Charles Darwin
Thomas Malthus
Alfred Wallace
3440. When Mendel crossed together two contrasting homozygous individuals, the phenotype of the hybrid in F1 cross appeared to be that of:
recessive parent
Dominant parent
Indifferent
None of Above
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