QBManager

Principle of Inheritance and Variation

184409 A gene is said to be dominant if : -

1 It is express it's effect only in homozygous stage

2 It is expressed only in heterozygous condition

3 It is expressed both in homozygous and heterozygous condition

4 It is never expressed in any condition

Explanation:

Exp. C A gene is said to be dominant if ,It is expressed both in homozygous and heterozygous condition.
For example- TT (Tall) (Homozygous) and Tt (tall) (Heterozygous) In both condition, tall plant express because ' $T$ ' is dominant
Note - Phenotypically both plant are tall but genotypically differ to each other

AIPMT-2002

Principle of Inheritance and Variation

184412 Ratio of long winged and vestigial winged Drosophila are formed when a pure long winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed

1

3 : 1

2

1 : 2 : 1

3

3 : 1, 1 : 2 : 1

4

1 : 0

TS EAMCET-09.08.2021 Shift-I

Principle of Inheritance and Variation

184416 When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained. The ratio of them is :

1 30 red : 90 white

2 90 red : 30 white

3 60 red : 60 white

4 All red

Explanation:

When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained ratio of them is all red because-

Since, correct option is $d$ all $F_{1}$ progeny are red.

Rajasthan PMT-1996

Principle of Inheritance and Variation

184420 In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in $F_{1}$ generation ?

1

3 : 1

2

50 : 50

3

9 : 1

4

1 : 3

Explanation:

The yellow seeds are dominant to green, the allele for yellow seeds should be represented with upper case letter while the one for green seeds should be written in lower case letter. Let's suppose that the allele for yellow seed is $Y$ and that for green seed is $y$ .
- Hence the genotype of the heterozygous yellow seeded plant will be "Yy" and that for green seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions.)
- The cross between heterozygous yellow seeded plant and green seeded plant will produce $50 %$ yellow seeded plants and $50 %$ green seeded plants. So the correct answer is ' $b$ '.

AIPMT-2007

Principle of Inheritance and Variation

184422 A tall plant was grown in nutrient deficient soil and remained dwarf, when it is crossed with dwarf plant, then

1 all hybrid plants are dwarf

2 all hybrid plants are tall

3

50 %

tall and

50 %

dwarf

4

75 %

tall and

25 %

dwarf

AP EAMCET-2011

Principle of Inheritance and Variation

184409 A gene is said to be dominant if : -

1 It is express it's effect only in homozygous stage

2 It is expressed only in heterozygous condition

3 It is expressed both in homozygous and heterozygous condition

4 It is never expressed in any condition

Explanation:

Exp. C A gene is said to be dominant if ,It is expressed both in homozygous and heterozygous condition.
For example- TT (Tall) (Homozygous) and Tt (tall) (Heterozygous) In both condition, tall plant express because ' $T$ ' is dominant
Note - Phenotypically both plant are tall but genotypically differ to each other

AIPMT-2002

Principle of Inheritance and Variation

184412 Ratio of long winged and vestigial winged Drosophila are formed when a pure long winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed

1

3 : 1

2

1 : 2 : 1

3

3 : 1, 1 : 2 : 1

4

1 : 0

TS EAMCET-09.08.2021 Shift-I

Principle of Inheritance and Variation

184416 When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained. The ratio of them is :

1 30 red : 90 white

2 90 red : 30 white

3 60 red : 60 white

4 All red

Explanation:

When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained ratio of them is all red because-

Since, correct option is $d$ all $F_{1}$ progeny are red.

Rajasthan PMT-1996

Principle of Inheritance and Variation

184420 In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in $F_{1}$ generation ?

1

3 : 1

2

50 : 50

3

9 : 1

4

1 : 3

Explanation:

The yellow seeds are dominant to green, the allele for yellow seeds should be represented with upper case letter while the one for green seeds should be written in lower case letter. Let's suppose that the allele for yellow seed is $Y$ and that for green seed is $y$ .
- Hence the genotype of the heterozygous yellow seeded plant will be "Yy" and that for green seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions.)
- The cross between heterozygous yellow seeded plant and green seeded plant will produce $50 %$ yellow seeded plants and $50 %$ green seeded plants. So the correct answer is ' $b$ '.

AIPMT-2007

Principle of Inheritance and Variation

184422 A tall plant was grown in nutrient deficient soil and remained dwarf, when it is crossed with dwarf plant, then

1 all hybrid plants are dwarf

2 all hybrid plants are tall

3

50 %

tall and

50 %

dwarf

4

75 %

tall and

25 %

dwarf

AP EAMCET-2011

Principle of Inheritance and Variation

184409 A gene is said to be dominant if : -

1 It is express it's effect only in homozygous stage

2 It is expressed only in heterozygous condition

3 It is expressed both in homozygous and heterozygous condition

4 It is never expressed in any condition

Explanation:

Exp. C A gene is said to be dominant if ,It is expressed both in homozygous and heterozygous condition.
For example- TT (Tall) (Homozygous) and Tt (tall) (Heterozygous) In both condition, tall plant express because ' $T$ ' is dominant
Note - Phenotypically both plant are tall but genotypically differ to each other

AIPMT-2002

Principle of Inheritance and Variation

184412 Ratio of long winged and vestigial winged Drosophila are formed when a pure long winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed

1

3 : 1

2

1 : 2 : 1

3

3 : 1, 1 : 2 : 1

4

1 : 0

TS EAMCET-09.08.2021 Shift-I

Principle of Inheritance and Variation

184416 When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained. The ratio of them is :

1 30 red : 90 white

2 90 red : 30 white

3 60 red : 60 white

4 All red

Explanation:

When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained ratio of them is all red because-

Since, correct option is $d$ all $F_{1}$ progeny are red.

Rajasthan PMT-1996

Principle of Inheritance and Variation

184420 In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in $F_{1}$ generation ?

1

3 : 1

2

50 : 50

3

9 : 1

4

1 : 3

Explanation:

The yellow seeds are dominant to green, the allele for yellow seeds should be represented with upper case letter while the one for green seeds should be written in lower case letter. Let's suppose that the allele for yellow seed is $Y$ and that for green seed is $y$ .
- Hence the genotype of the heterozygous yellow seeded plant will be "Yy" and that for green seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions.)
- The cross between heterozygous yellow seeded plant and green seeded plant will produce $50 %$ yellow seeded plants and $50 %$ green seeded plants. So the correct answer is ' $b$ '.

AIPMT-2007

Principle of Inheritance and Variation

184422 A tall plant was grown in nutrient deficient soil and remained dwarf, when it is crossed with dwarf plant, then

1 all hybrid plants are dwarf

2 all hybrid plants are tall

3

50 %

tall and

50 %

dwarf

4

75 %

tall and

25 %

dwarf

AP EAMCET-2011

Principle of Inheritance and Variation

184409 A gene is said to be dominant if : -

1 It is express it's effect only in homozygous stage

2 It is expressed only in heterozygous condition

3 It is expressed both in homozygous and heterozygous condition

4 It is never expressed in any condition

Explanation:

Exp. C A gene is said to be dominant if ,It is expressed both in homozygous and heterozygous condition.
For example- TT (Tall) (Homozygous) and Tt (tall) (Heterozygous) In both condition, tall plant express because ' $T$ ' is dominant
Note - Phenotypically both plant are tall but genotypically differ to each other

AIPMT-2002

Principle of Inheritance and Variation

184412 Ratio of long winged and vestigial winged Drosophila are formed when a pure long winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed

1

3 : 1

2

1 : 2 : 1

3

3 : 1, 1 : 2 : 1

4

1 : 0

TS EAMCET-09.08.2021 Shift-I

Principle of Inheritance and Variation

184416 When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained. The ratio of them is :

1 30 red : 90 white

2 90 red : 30 white

3 60 red : 60 white

4 All red

Explanation:

When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained ratio of them is all red because-

Since, correct option is $d$ all $F_{1}$ progeny are red.

Rajasthan PMT-1996

Principle of Inheritance and Variation

184420 In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in $F_{1}$ generation ?

1

3 : 1

2

50 : 50

3

9 : 1

4

1 : 3

Explanation:

The yellow seeds are dominant to green, the allele for yellow seeds should be represented with upper case letter while the one for green seeds should be written in lower case letter. Let's suppose that the allele for yellow seed is $Y$ and that for green seed is $y$ .
- Hence the genotype of the heterozygous yellow seeded plant will be "Yy" and that for green seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions.)
- The cross between heterozygous yellow seeded plant and green seeded plant will produce $50 %$ yellow seeded plants and $50 %$ green seeded plants. So the correct answer is ' $b$ '.

AIPMT-2007

Principle of Inheritance and Variation

184422 A tall plant was grown in nutrient deficient soil and remained dwarf, when it is crossed with dwarf plant, then

1 all hybrid plants are dwarf

2 all hybrid plants are tall

3

50 %

tall and

50 %

dwarf

4

75 %

tall and

25 %

dwarf

AP EAMCET-2011

Principle of Inheritance and Variation

184409 A gene is said to be dominant if : -

1 It is express it's effect only in homozygous stage

2 It is expressed only in heterozygous condition

3 It is expressed both in homozygous and heterozygous condition

4 It is never expressed in any condition

Explanation:

Exp. C A gene is said to be dominant if ,It is expressed both in homozygous and heterozygous condition.
For example- TT (Tall) (Homozygous) and Tt (tall) (Heterozygous) In both condition, tall plant express because ' $T$ ' is dominant
Note - Phenotypically both plant are tall but genotypically differ to each other

AIPMT-2002

Principle of Inheritance and Variation

184412 Ratio of long winged and vestigial winged Drosophila are formed when a pure long winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed

1

3 : 1

2

1 : 2 : 1

3

3 : 1, 1 : 2 : 1

4

1 : 0

TS EAMCET-09.08.2021 Shift-I

Principle of Inheritance and Variation

184416 When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained. The ratio of them is :

1 30 red : 90 white

2 90 red : 30 white

3 60 red : 60 white

4 All red

Explanation:

When a cross is made between pure red and pure white flowers of pea plant, then 120 plants are obtained ratio of them is all red because-

Since, correct option is $d$ all $F_{1}$ progeny are red.

Rajasthan PMT-1996

Principle of Inheritance and Variation

184420 In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in $F_{1}$ generation ?

1

3 : 1

2

50 : 50

3

9 : 1

4

1 : 3

Explanation:

The yellow seeds are dominant to green, the allele for yellow seeds should be represented with upper case letter while the one for green seeds should be written in lower case letter. Let's suppose that the allele for yellow seed is $Y$ and that for green seed is $y$ .
- Hence the genotype of the heterozygous yellow seeded plant will be "Yy" and that for green seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions.)
- The cross between heterozygous yellow seeded plant and green seeded plant will produce $50 %$ yellow seeded plants and $50 %$ green seeded plants. So the correct answer is ' $b$ '.

AIPMT-2007

Principle of Inheritance and Variation

184422 A tall plant was grown in nutrient deficient soil and remained dwarf, when it is crossed with dwarf plant, then

1 all hybrid plants are dwarf

2 all hybrid plants are tall

3

50 %

tall and

50 %

dwarf

4

75 %

tall and

25 %

dwarf

AP EAMCET-2011