Genetics ICSE Class-10 Concise Selina Biology Solutions

Selina Publishers Answer of Exercise -3 Genetics

rk class=’yoast-text-mark’>tyle=”text-align: justify;”><strong>Genetics ICSE Class-10 Concise</strong> Selina Biology Solutions Chapter-3. We Provide Step by Step Answer of Progress Check , MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type Questions and Structured / Applications / Skill Type Questions of Exercise-3 <strong>Genetics ICSE Class-10</strong>. Visit official Website <strong>rk class=’yoast-text-mark’>tyle=”color: #0000ff;”>rk class=’yoast-text-mark’>tyle=”color: #0000ff;” href=”https://www.cisce.org/”>CISCE </strong> for detail information about ICSE Board Class-10.

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Genetics ICSE Class-10 Concise Selina Biology Solutions Chapter-3

rk class=’yoast-text-mark’>tyle=”text-align: center;”>rk class=’yoast-text-mark’>tyle=”color: #ff0000;”><strong>-: Select Topics :-</strong>

rk class=’yoast-text-mark’>tyle=”text-align: center;”>ref=”#a”>rk class=’yoast-text-mark’>tyle=”color: #0000ff;”><strong>A-MULTIPLE CHOICE TYPE</strong>

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rk class=’yoast-text-mark’>tyle=”text-align: center;”>ref=”#b”>rk class=’yoast-text-mark’>tyle=”color: #0000ff;”><strong>B. VERY SHORT ANSWER TYPE</strong>

rk class=’yoast-text-mark’>tyle=”text-align: center;”>ref=”#c”>rk class=’yoast-text-mark’>tyle=”color: #0000ff;”><strong>C. SHORT ANSWER TYPE</strong>

rk class=’yoast-text-mark’>tyle=”text-align: center;”>ref=”#d”>rk class=’yoast-text-mark’>tyle=”color: #0000ff;”><strong>D. LONG </strong><strong>ANSWER </strong><strong>TYPE</strong>

rk class=’yoast-text-mark’>tyle=”text-align: center;”>ref=”#e”>rk class=’yoast-text-mark’>tyle=”color: #0000ff;”><strong>E. STRUCTURED/APPLICATION/SKILL TYPE</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Note :-  Before Viewing Concise Solutions of Chapter-3<strong> Genetics ICSE Class-10  </strong>. Read the whole chapter carefully with figure.

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rk class=’yoast-text-mark’>tyle=”text-align: justify;”><strong style=”color: #2d2d2d; font-family: Khand, sans-serif; font-size: 25px; text-align: left; text-transform: inherit;”>rk class=’yoast-text-mark’>tyle=”color: #ff0000;”>A. Multiple Choice Type </strong>rk class=’yoast-text-mark’>tyle=”color: #2d2d2d; font-family: Khand, sans-serif; font-size: 30px; font-weight: 600; text-transform: inherit;”>Genetics ICSE Class-10 Concise Selina Biology Solutions Chapter-3

rk class=’yoast-text-mark’>tyle=”text-align: justify;”><strong style=”color: #2d2d2d; font-family: Khand, sans-serif; font-size: 20px; text-transform: inherit;”>Question 1</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Which one of the following is the phenotypic monohybrid ratio in F<sub>2</sub> generation?

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  1. a) 3 : 1
  2. b) 1 : 2 : 1
  3. c) 2 : 2
  4. d) 1 : 3

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 1</strong>

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  1. a) 3 : 1

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 2</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>If a pure tall plant is crossed with a pure dwarf plant, then offspring will be

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a) all tall

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b) all dwarf

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) 3 tall 1 dwarf

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(d) 50% tall 50% dwarf

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 2</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a) all tall

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 3</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>The 9:3:3:1 dihybrid ratio is due to

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a) segregation

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b) crossing over

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) independent assortment

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(d) homologous pairing

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 3</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) independent assortment

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 4</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>A plant with green pods and smooth seeds with genotype Ggss will give rise to the following gametes:

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a) Gg and Ss

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b) Gs and ss

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) Gs and gs

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(d) Gg and gs

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 4</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) Gs and gs

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rk class=’yoast-text-mark’>tyle=”text-align: left;”><strong id=”b” style=”color: #ff0000; font-size: 25px; text-align: justify; text-transform: inherit;”>B. Very Short Answer Type: </strong>Genetics ICSE Class-10 Concise Selina Biology Solutions Chapter-3

rk class=’yoast-text-mark’>tyle=”text-align: left;”><strong style=”color: #2d2d2d; font-family: Khand, sans-serif; font-size: 20px; text-align: justify; text-transform: inherit;”>Question 1</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Match the terms in column I with their the explanations in column II

<table><tbody><tr><td width=”51″> </td><td width=”142″>

<strong>Column I</strong>

(Term)

</td><td width=”248″>

<strong>Column II</strong>

(Explanation)

</td></tr><tr><td width=”51″>a</td><td width=”142″>Genetics</td><td width=”248″>(i) Chromosomes similar in size and shape</td></tr><tr><td width=”51″>b</td><td width=”142″>Autosomes</td><td width=”248″>(ii) The alternative forms of a gene</td></tr><tr><td width=”51″>c</td><td width=”142″>Recessive gene</td><td width=”248″>(iii) Study of laws of inheritance of characters</td></tr><tr><td width=”51″>d</td><td width=”142″>Allele</td><td width=”248″>(iv) A gene that can express when only in a similar pair</td></tr><tr><td width=”51″>e</td><td width=”142″>Homologous chromosomes</td><td width=”248″>(v) Chromosomes other than the pair of sex chromosomes</td></tr></tbody></table>

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 1</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a) – (iii) Study of laws of inheritance of characters

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b) – (v) Chromosomes other than the pair of sex chromosomes

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) – (iv) A gene that can express when only in a similar pair

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(d) – (ii) The alternative forms of a gene

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(e) – (i) Chromosomes similar in size and shape

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 2</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Name any two genetic diseases in humans.

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 2</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Colour-blindness, Thalassaemia, Sickle cell anaemia and Haemophilia (Any two)

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 3</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Which one of the following genotypes is  homozygous dominant and which one homozygous recessive in regard to tongue rolling:<br />Rr, rr, RR?

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 3</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Homozygous dominant – RR

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Homozygous recessive – rr

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rk class=’yoast-text-mark’>tyle=”text-align: left;”>rk class=’yoast-text-mark’>tyle=”color: #ff0000;”><strong>C. Short Answer Type </strong>rk class=’yoast-text-mark’>tyle=”font-size: 25px; font-weight: 500; text-transform: inherit;”>Genetics ICSE Class-10 Concise Selina Biology Solutions Chapter-3

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 1</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Differentiate between:

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a) Genotype and Phenotype

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b) Character and Trait

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(c) monohybrid and dihybrid cross (phenotypic ratio).

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 1</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(a)

<table><tbody><tr><td width=”223″><strong>Phenotype</strong></td><td width=”202″><strong>Genotype</strong></td></tr><tr><td width=”223″>The observable characteristic which is genetically controlled is called phenotype.</td><td width=”202″>The set of genes present in the cells of an organism is called its genotype.</td></tr></tbody></table>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b)

<table><tbody><tr><td width=”223″><strong>Character</strong></td><td width=”202″><strong>Trait</strong></td></tr><tr><td width=”223″>Any heritable feature is called a character.</td><td width=”202″>The alternative form of a character is called trait.</td></tr></tbody></table>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>(b)

<table><tbody><tr><td width=”207″><strong>Monohybrid cross</strong></td><td width=”208″><strong>Dihybrid cross</strong></td></tr><tr><td width=”207″>Phenotypic ratio – 3:1</td><td width=”208″>Phenotypic ratio- 9:3:3:1</td></tr></tbody></table>

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 2</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Among lion, tiger and domestic cat, all the three have the same number of 38 chromosomes, yet they have different appearances. How do you account for such differences?

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 2</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>The characteristics of a species such as physical appearance, body functions and behavior are not only the outcome of chromosome number, but these depend on the genotype of every organism. That means the set of genes present in the organisms may very and therefore lion, tiger and domestic cat have the same number of 38 chromosomes, their characteristics (like different appearances) are the result of the genes located on the chromosomes.

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 3</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>List any three features of garden pea with their dominant and recessive traits.

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 3</strong>

<table><tbody><tr><td width=”147″><strong>Character</strong></td><td width=”147″><strong>Dominant<br />trait</strong></td><td width=”147″><strong>Recessive<br />trait</strong></td></tr><tr><td width=”147″>Flower<br />Colour</td><td width=”147″>Purple</td><td width=”147″>White</td></tr><tr><td width=”147″>Seed<br />Colour</td><td width=”147″>Yellow</td><td width=”147″>Green</td></tr><tr><td width=”147″>Seed<br />Shape</td><td width=”147″>Round</td><td width=”147″>Wrinkled</td></tr><tr><td width=”147″>Pod<br />Shape</td><td width=”147″>Inflated</td><td width=”147″>Constricted</td></tr><tr><td width=”147″>Flower Position</td><td width=”147″>Axial</td><td width=”147″>Terminal</td></tr></tbody></table>

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Question 4</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Explain why generally only the male child suffers from colour blindness and not the female?

rk class=’yoast-text-mark’>tyle=”font-weight: 500; text-align: justify;”><strong>Answer 4</strong>

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Colour-blindness is caused due to recessive genes which occur on the X chromosome.

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Males have only one X chromosome. If there is recessive gene present on X chromosome, then the male will suffer from colour-blindness.

rk class=’yoast-text-mark’>tyle=”text-align: justify;”>Females have two X chromosomes. It is highly impossible that both the X chromosomes carry abnormal gene. Hence, if one gene is abnormal and since it is recessive, its expression will be masked by the normal gene present on the other X chromosome. Females are unlikely to suffer from colour-blindness.

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