Phenotype and Genotype

Q.

Define clone.

Q.

In the pea plant, purple colour of flower is dominant over white colour. Progeny obtained by crossing pure purple flowered plants with white flowered plants are self-pollinated. The resulting plants produced are:

1. All white flowered plants.

2. Purple flowered plants and white flowered plants in a 3 : 1 ratio.

3. All purple flowered plants.

4. Purple flowered and white flowered plants in equal numbers.

Q.

The term for alternative forms of a gene is known as ___________.

Q. How will you distinguish between natural selection and artificial selection?

Q.

Phenotype of an organism is the result of :

1. Cytoplasmic effects and nutrition

2. Genotype and environment interactions

3. Environmental changes and sexual dirmophism

4. Mutations and linkages

Q.

An organism with two different alleles of a gene in a cell is called__________,

1. Homozygous

2. Heterozygous

3. Hybrid

4. Dominant

Q. A pea plant produces gametes with the genotypes RY, Ry, rY and ry. What is the corresponding genotype of this plant?

एक मटर का पादप जीनप्ररूप (जीनोटाइप) RY, Ry, rY तथा ry वाले युग्मकों को उत्पन्न करता है तो इस पादप का समरूपी जीनप्ररूप (जीनोटाइप) क्या है?

1. RrYy
2. RRYY
3. RrYY
4. RRyy

Q. Define the following terms: [5 MARKS]
(i) Allele
(ii) Dominant gene
(iii) Genotype
(iv) Phenotype
(v) Heterozygous dominant

Q.

Select the correct statement.

1. Spliceosome takes part in translation.

2. Franklin Stahl coined the term “linkage”.

3. Transduction was discovered S. Altman.

4. Punnett square was developed by a British scientist.

Q.

Are alleles on the same chromosome?

Q.

A set of observable characteristics of an individual organism is called _____.

1. physiology

2. prototype

3. phenotype

4. genotype

Q.

How do multiple alleles occur?

Q.

In the pea plant, purple colour of the flower is dominant over white colour. Progeny obtained by crossing pure purple-flowered plants with white-flowered plants are self-pollinated. The resulting plants produced are:

1. All purple flowered plants.

2. Purple flowered plants and white flowered plants in a 3 : 1 ratio.

3. Purple flowered and white flowered plants in equal numbers.

4. All white flowered plants.

Q.

What is an example of missense mutation?

Q.

The red-RR is crossed with white-rr. All the offspring are pink-Rr. This indicates the R gene is_________.

1. recessive

2. hybrid

3. none of these

4. incomplete dominant

Q.

What are genes that code for a pair of contrasting characters called?

Q.

How many alleles does each person carry for every trait?

Q.

Do bacteria have alleles?

Q.

An allele is defined as __________.

1. a chromosome

2. a versions of a gene

3. a specific form of a gene

4. a physical characteristic

Q.

A set of observable characteristics of a living organisms is called ?

Q. In a monohybrid cross, two pea plants were crossed and produced 360 offspring. Out of these, 270 individuals show dominant phenotype for stem height. What was the genotype of the parents?

एक एकसंकर संकरण में दो मटर के पादप का संकरण करवाया गया तथा 360 संतति उत्पन्न हुए। इनमें से 270 पादप तने की ऊँचाई के लिए प्रभावी लक्षणप्ररूप (फीनोटाइप) दर्शाते हैं तो जनकों का जीनप्ररूप (जीनोटाइप) क्या था?

1. TT × Tt
2. tt × TT
3. Tt × Tt
4. tt × tt

Q. When Mendel crossed a Tall plant with a Dwarf plant, the ratio of dwarf plants in F2 generation was ___ %.

Q.

How does the environment influence genes?

Q.

Why does a person only have 2 alleles?

Q.

For given penthybrid cross for $AaBbCcDdEe$ how many possible different genotype and phenotype is obtained in $F_2$ generation?

Q. In a monohybrid cross, two pea plants were crossed and produced 180 offsprings. Out of these, 135 individuals show dominant phenotype for stem height. What was the genotype of the parents?

एक एकसंकर संकरण में दो मटर के पादप का संकरण करवाया गया तथा 180 संतति उत्पन्न हुए। इनमें से 135 पादप तने की ऊँचाई के लिए प्रभावी लक्षणप्ररूप (फीनोटाइप) दर्शाते हैं तो जनकों का जीनप्ररूप (जीनोटाइप) क्या था?

1. TT × Tt
2. tt × TT
3. Tt × Tt
4. tt × tt

Q. What is phenotype?

Q. Sickle cell anaemia is an example of

1. Single base substitution mutation
2. Deletion of a single base
3. Insertion of a single base
4. Non-frameshift mutation

Q.

In the pea plant, purple colour of flower is dominant over white colour. Progeny obtained by crossing pure purple flowered plants with white flowered plants are self-pollinated. The resulting plants produced are:

1. All purple flowered plants.

2. Purple flowered plants and white flowered plants in a 3 : 1 ratio.

3. Purple flowered and white flowered plants in equal numbers.

4. All white flowered plants.

Q. Which among the following is/are advantage(s) of hybrid seeds?

1. Better fruit quality
2. Increase in cost
3. Disease resistant
4. High shelf life