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Heredity and Evolution Scan test I

Description: Heredity and Evolution Scan test I
Number of Questions: 40
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Tags: Heredity and Evolution Scan test I Life Processes
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What is the gene ratio of F2 generation in a monohybrid cross?

  1. 3:1

  2. 3 : 1 : 2

  3. 2 :3

  4. 3: 0


Correct Option: A
Explanation:

The phenotypic ratio of dominant to recessive phenotypes of F2 generation in a monohybrid cross is 3 : 1.

A trait that always appears in two opposite forms is called a __________ trait.

  1. contrasting

  2. recessive

  3. dominant

  4. polygenic


Correct Option: A

The human traits are influenced by DNA of ___.

  1. mother

  2. father

  3. siblings

  4. both (1) and (2)


Correct Option: D

The plants produced from self-pollination of first generation plants constitute the __________.

  1. parent plants

  2. F1 plants

  3. F2 plants

  4. F3 plants


Correct Option: C

How many pairs of contrasting traits were considered by Mendel in pea plant?

  1. 7

  2. 8

  3. 6

  4. 9


Correct Option: A

Which of the following is not a variant in humans?

  1. Shape of hair

  2. Number of forelimbs

  3. Attached ear lobes

  4. Rolling of tongue


Correct Option: B

If Tall (TT) is cross bred with dwarf (tt), what will be the characteristics of F1 plants?

  1. All tall

  2. Both tall and short

  3. All short

  4. In between tall and short


Correct Option: A

There are __________ versions for each trait in an offspring.

  1. 2

  2. 3

  3. 4

  4. 5


Correct Option: A

The ratio of maternal DNA to the paternal DNA in the offspring is _____.

  1. 1: 1

  2. 1: 2

  3. 2: 1

  4. 1: 0


Correct Option: A

The branch of science dealing with heredity and variation is ______.

  1. genetics

  2. biology

  3. biotechnology

  4. botany


Correct Option: A

What is the name given to the plants produced from cross-pollination of parent plants?

  1. F3 plants

  2. F1 plants

  3. F2 plants

  4. F4 plants


Correct Option: B

The differences in some of the traits of children from their parents are due to ______.

  1. heredity

  2. variation

  3. evolution

  4. diversity


Correct Option: B

A crow can never give birth to an eagle due to the essence of ___.

  1. evolution

  2. heredity

  3. diversity

  4. variation


Correct Option: B

Variations cannot occur due to _____.

  1. crossing over

  2. mutation

  3. effect of environment

  4. asexual reproduction


Correct Option: D

Who is considered to be the father of genetics?

  1. Mendel

  2. Darwin

  3. Sutton

  4. Morgan


Correct Option: A
Explanation:

 Gregor Mendel, known as the "father of modern genetics", was born in Austria in 1822.

__________ can change their sex during their life.

  1. Humans

  2. Birds

  3. Lizards

  4. Snails


Correct Option: D

Which is the genetic material in living organisms?

  1. DNA

  2. ADP

  3. ATP

  4. NADP


Correct Option: A

If tall height (T) is a dominant trait and short height is a recessive trait (t) in garden pea, which of the following statements is true?

  1. TT and tt will be tall plants.

  2. TT and Tt will be tall plants.

  3. TT and tt will be dwarf plants.

  4. tt will be tail plants.


Correct Option: B

The differences in the traits among the individuals of a species is known as ___________.

  1. evolution

  2. inheritance

  3. heredity

  4. variation


Correct Option: D

Mendel formulated the law of independent assortment on the basis of ______.

  1. monohybrid cross

  2. back cross

  3. dihybrid cross

  4. test cross


Correct Option: C

The Mendelian “factors” are now known as __________.

  1. genes

  2. chromosome

  3. DNA

  4. Chromatid


Correct Option: A

A region of DNA that controls hereditary characters is known as ___.

  1. chromosome

  2. chromatin

  3. gene

  4. enzyme


Correct Option: C

Which experimental plant was used by Mendel?

  1. Wild pea

  2. Edible pea

  3. Garden pea

  4. Chick pea


Correct Option: C

The sex chromosomes in a human male are represented as __________.

  1. XY

  2. XX

  3. xx

  4. xy


Correct Option: A

How many sex chromosomes are present in a human cell?

  1. 1 pair

  2. 2 pair

  3. 3 pair

  4. 4 pair


Correct Option: A

The transmission of characters from one generation to the next generation is termed as ______.

  1. variation

  2. heredity

  3. evolution

  4. diversity


Correct Option: B

Genes control a trait while __________ help in the expression of a trait.

  1. fats

  2. carbohydrates

  3. proteins

  4. vitamins


Correct Option: C

How many chromosomes are present in a human cell?

  1. 42

  2. 44

  3. 46

  4. 48


Correct Option: C

Heredity traits are determined by specific _____.

  1. proteins

  2. genes

  3. sexes

  4. characters


Correct Option: B

Homologous chromosomes are ________.

  1. similar in size and shape

  2. derived from the mother

  3. present in sex cells only

  4. present in groups of four each


Correct Option: A

What is the ratio of F2 generation in a dihybrid cross?

  1. 1 : 3 : 1

  2. 1 : 4

  3. 9 : 3 : 3 : 1

  4. 9 : 3 : 3


Correct Option: C

Chromosome is a linear thread-like strand made up of _______.

  1. DNA and proteins

  2. DNA and RNA

  3. DNA and minerals

  4. DNA and lipids


Correct Option: A

What determines the sex of an individual?

  1. The sperm cell

  2. Number of chromosomes

  3. Autosomal chromosomes

  4. Size of the chromosomes


Correct Option: A

Which of the following options is a homozygous-dominant dihybrid condition?

  1. TTRR

  2. Ttrr

  3. TtRr

  4. ttRr


Correct Option: A

The number of autosomal chromosomes present in human beings is _____.

  1. 55

  2. 44

  3. 23

  4. 16


Correct Option: B
Explanation:

 In humans, each cell normally contains 23 pairs of chromosomes, i.e. a total of 46. 22 of these pairs (44 in number), called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X chromosome and one Y chromosome.

For a cross between tall plant with round seeds (TTRR) and short plant with wrinkled seeds (ttrr), the F1 plants will be __________.

  1. tall plants with round seed

  2. short plant with wrinkled seed

  3. tall plant with wrinkled seed

  4. short plant with round seeds


Correct Option: A

How many pairs of chromosomes are present in human beings?

  1. 25

  2. 24

  3. 23

  4. 22


Correct Option: C

__________ provides the information for synthesis of enzymes.

  1. Chromatin

  2. Gene

  3. Chromosome

  4. Nucleus


Correct Option: B

The presence of __________ chromosome is required for developing into a female.

  1. X

  2. Y

  3. O

  4. both (1) and (2)


Correct Option: A

A child who inherits an X-chromosome from father will be a _____.

  1. boy

  2. girl

  3. any of the two

  4. cannot be determined


Correct Option: B
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