PPSC Zoology MCQs |

Zoology MCQs for Lecturer PPSC FPSC KKPSC SPSC Test No. 41

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There will be 25 multiple choice question in the test.
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Test Instructions:-
Test Name	Lecturer Zoology
Subject	Zoology Test 41
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

Lecturer Zoology Online Test No. 41

1 / 25

A single genetic locus that controls more than one trait is said to be____.

Polygenic

Epistatic

Pleiotropic

Autotrophic

2 / 25

A couple both descended from eastern European (Ashkenazic) Jews, visit a genetic counselor before trying to have children. In view of their enthic background, the counselor recommends that they be tested to see if they are carriers for___

Cystic fibrosis

Hemophilia

Sickle-cell disease

Tay- Sachs

3 / 25

An AABbccDdEeFF individual is crossed with an individual with the genotype AaBBCCDdEeff. What is the probability that their offspring will have the genotype AaBBCcddEEFf?

1/4

1/16

1/32

1/64

4 / 25

Who was the work of Mendel unique compared with that of others studying plant genetics at the time?

Unlike the others, Mendel applied statistics to his results

Mendel crossed hybrids only

Mendel used artificial pollination.

All of these are correct.

5 / 25

In a typical pedigree chart, a half filled circle indicates a___.

Recessive parent

Non- affected male

Affected female

Carrier female

6 / 25

If each parent can produce 100 genetically distinct gametes, how many genetically distinct offspring can two parents produce?

10,000

200

1,000

100

7 / 25

Which choice below describes the Tay- Sachs allele at the molecular level?

Dominant

Codominant

Recessive

8 / 25

The basic unit of inheritance is a (n)__.

Allele

Trait

Gene

Chromosome

9 / 25

Pea flowers may be purple (P) or white (p). Pea seeds may be round (R) or wrinkled (r). What proportion of the offspring from the cross PpRr x PpRr will have white flowers and wrinkled seeds?

1/16

1/4

3/4

10 / 25

If a heterozygous plant is allowed to self-pollinate, what proportion of the offspring will also be heterozygous?

1/4

1/3

1/2

2/3

11 / 25

Mendel's pea plants had either yellow or green unripe pods. These characteristics represent an organism's ____.

Adaptedness

Genotype

Phenotype

Chromosomes

12 / 25

Which of the following matings cannot produce a child with blood type O? The letters refer to blood types (phenotypes).

A × A

A × B

O × AB

O × O

13 / 25

The typical phenotypic ratio expected from a monohybrid cross involving simple dominance is ___.

1:1

4:0

3:1

2:2

14 / 25

Tom's brother suffers from phenylketonuria (PKU) a recessive disorder. The brother's parents do not have PKU. What are the chances that Tom, who is normal for this trait, is a Carrier of PKU?

1/4

1/3

1/2

2/3

15 / 25

Organisms that vary from the wild type are called_____.

Mutant

Recessive

Independent

Dominant

16 / 25

When the genotype of an individual is unknown, what kind of cross should be made?

Monohybrid cross

Dihybrid cross

Testcross

Reciprocal cross

17 / 25

If an organism has been designated Tt, it is_____.

Homozygous dominant

Heterozygous

Homozygous recessive

Homologous

18 / 25

Which human disorder is inherited as an autosomal dominant?

Phenylketonuria

Huntington disease

Cystic fibrosis

Sickle cell disease

19 / 25

A woman with type O blood is expecting a child. Her husband is type A . Both the woman's father and her husband's father had type B blood What is the probability that the child will have type O blood?

100%

75%

50%

25%

20 / 25

Tay-Sachs disease runs in Rebecca's family On a family pedigree, she saw a shaded circle this represents a____

Male with Tay-Sachs

Female carrier

Male carrier

Female with Tay-Sachs

21 / 25

An individual with the genotype AABbCcDD can make how many different kinds of gametes?

22 / 25

A red bull is crossed with a white cow and all of the offspring are roan, an intermediate colour that is caused by the presence of both red and white hairs. This is an example of genes that are____.

Nonhomogeneous

Epistasis

Codominant

Polygenic

23 / 25

A man who has type B blood and a woman who has type A blood could have children of which of the following phenotype?

A or B only

AB only

AB or O

A ,B, AB , or O

24 / 25

Huntington's disease is an example of a genetic disorder caused by___.

A lethal dominant allele that afflicts an individual later in life

A non-lethal dominant allele

A late acting recessive allele

Homozygous recessive alleles

25 / 25

Michelle and Keith are apparently normal, but their daughter was born with alkaptonuria, an inherited metabolic disorder.If alkaptonuria is like most other human hereditary disorders, the probability of their next child being born with alkaptonuria is____

1/4

1/2

2/3

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