66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Lakhmir Singh & Manjit Kaur- Biology

Very Short Answer Type Questions-Pg-191

1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17

Short Answer Type Questions-Pg-192

18 19 20 A 20 B 21 22 A 22 B 23 24 25 A 25 B 26 27 A 27 B 27 C 28 A 28 B 29 30 31 32

Long Answer Type Questions-Pg-192

33 A 33 B 34 A 34 B 35 A 35 B 35 C 36 A 36 B 36 C 37 A 37 B

Multiple Choice Questions (MCQs)-Pg-193

38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

Questions Based on High Order Thinking Skills (HOTS)-Pg-195

66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Very Short Answer Type Questions-Pg-208

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Short Answer Type Questions-Pg-209

17 18 19 20 21 22 23 24 25 26 27 28 29 30 A 30 B 31 32 33

Long Answer Type Questions-Pg-210

34 A 34 B 35 36 A 36 B 37 A 37 B 38 A 38 B

Multiple Choice Questions (MCQs)-Pg-210

39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Questions Based on High Order Thinking Skills (HOTS)-Pg-211

65 66 67 68 69 70

Q. 775.0( 2 Votes )

A person first crossed pure-bred pea plants having round-yellow seeds with pure-bred pea plants having wrinkled-green seeds and found that only A-B type of seeds were produced in the F₁generation. When F₁ generation pea plants having A-B type of seeds were cross-bred by self-pollination, then in addition to the original round-yellow and wrinkled-green seeds, two new varieties A-D and C-B type of seeds were also obtained.

(a) What are A-B type of seeds?

(b) State whether A and B are dominant traits or recessive traits.

(c) What are A-D type of seeds?

(d) What are C-B type of seeds?

(e) Out of A-B and A-D types of seeds, which one will be produced in

(i) minimum numbers, and

(ii) maximum numbers, in the F₂ generation ?

Class 10th Lakhmir Singh & Manjit Kaur- Biology 4. Heredity and Evolution

Answer :

(a)Round Yellow.

Round yellow- RRYY, wrinkled green-rryy. On crossing these two pea plants we get RrYy combination which has dominant gene R for Round shape and Dominant gene Y for yellow color. Hence A-B types of seed produced as a result of the first cross are Round yellow.

(b) A and B are dominant traits since they are Round (R) and yellow (Y)

(c) Round-green

When RrYy obtained in the first generation is self-pollinated, the new varieties obtained are RY, Ry, rY, ry; where RY- Round yellow, Ry-Round green, rY-Wrinkled yellow, and ry- wrinkled green. Since A-B type of seed is Round and yellow, therefore A-D type of seed is Round and Green.

(d) Wrinkled-yellow

When RrYy obtained in the first generation is self-pollinated, the new varieties obtained are RY, Ry, rY, ry; where RY- Round yellow, Ry-Round green, rY-Wrinkled yellow, and ry- wrinkled green. Since A-B type of seed is Round and yellow, therefore C-B type of seed is wrinkled and yellow.

(e)(i) A-D (Round and green ‘Ry’ will be produced in minimum number)

(ii) A-B (Round and yellow ‘RY’ will be produced in maximum number in F2 generation)

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSA Mendelian experiment consisted of breeding tall TT pea plants bearing violet flowers with short t pea plants bearing white w flowers. The progeny all bore violet W flowers, but almost half of them were short. This suggested that the genetic make-up (or genotype) of the tall parent can be depicted as:(a) TTWW(b) TTww(c) TtWW(d) TtWwGive reason for your choice NEXTThe person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilization, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.(a) What are chromosomes?(i) B(ii) D, and(iii) E ?(b) Out of B, D and E, which two chromosomes are of the same type?(c) Which chromosome is smaller in size?(d) What is the general name of chromosomes such as B and E?(e) Out of the two persons A and C, which one is(i) male, and(ii) female ?

Related Videos

Introduction to Genetic Terms

Introduction to Genetic Terms

Introduction to Genetic Terms46 mins

NCERT | Heredity and Evolution (Part-1)

NCERT | Heredity and Evolution (Part-1)

NCERT | Heredity and Evolution (Part-1)37 mins

Learn Some Basic Concepts of Heredity

Learn Some Basic Concepts of Heredity

Learn Some Basic Concepts of Heredity50 mins

Quiz | Let's Check Our Understanding on Heredity

Quiz | Let's Check Our Understanding on Heredity

Quiz | Let's Check Our Understanding on Heredity36 mins

Smart Revision | Some Basic Terms of Heredity

Smart Revision | Some Basic Terms of Heredity

Smart Revision | Some Basic Terms of Heredity52 mins

Smart Revision | Mendelian Genetics

Smart Revision | Mendelian Genetics

Smart Revision | Mendelian Genetics47 mins

Smart Revision | Heredity

Smart Revision | Heredity

Smart Revision | Heredity60 mins

Evolution of Humans

Evolution of Humans

Evolution of Humans9 mins

Interactive Quiz: Interesting facts on evolution of Geometry

Interactive Quiz: Interesting facts on evolution of Geometry

Interactive Quiz: Interesting facts on evolution of Geometry42 mins

Idioms and Phrases

Idioms and Phrases

Idioms and Phrases43 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

caricature

view all courses

RELATED QUESTIONS :

Which statement is true for a dominant allele?

All In One Science

A recessive homozygote is crossed with a heterozygote of the same gene. What will be the phenotype of the F 1 -generation?

All In One Science

What determines the sex of a child?

All In One Science

The genotype of the height of an organism is written as Tt. What conclusion may be drawn?

All In One Science

Which statement about the genotypes of organisms is correct?

All In One Science

In the second generation, the dwarf trait reappears during Mendel’s experiment in monohybrid cross. Why so?

All In One Science

The genotype of green-stemmed tomato plants is denoted as GG and that of purple-stemmed tomato plants as gg. When these two are crossed,

i. What colour of stem would you expect in their F₁ progeny?

ii. Give the percentage of purple-stemmed plants if F₁ plants are self-pollinated.

iii. In what ratio would you find the genotypes GG and Gg in the F₂ progeny?

Xam idea - Science

How did Mendel explain that it is possible that a trait is inherited but not expressed in an organism?

Xam idea - Science

In one of his experiments with pea plants, Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant, in the first generation, F1 only tall plants appear.

i. What happens to the traits of the dwarf plants in this case?

ii. When the F1 generation plants were self-fertilised, he observed that in the plants of the second generation, F2 both tall plants and dwarf plants were present. Why it happened? Explain briefly.

Xam idea - Science