Law of Segregation

Q.

How many different types of gametes will be produced by a plant having genotype AABbCc?

1. 1

2. 3

3. 4

4. 2

Q. The frequency of two alleles in a gene pool is 0.19 (A) and 0.81 (a). Assume that the size of the population is 100 and the popultaion is in Hardy-Weinberg equilibrium. [3]
a) Calculate the number of heterozygous individuals in the population.
b) Calculate the number of homozygous recessive individual in the population.

Q.

What could be an example of sex influenced trait?

Q.

Which one of the following cannot be explained on the basis of Mendel’s Law Of Dominance?

1. The discrete unit controlling a particular character is called a factor

2. Out of one pair of factors, one is dominant, and the other recessive

3. Factors occur in pairs

4. Alleles do not show any blending and both the characters recover as such in F2 generation

Q. What will be the colour of pods in the progeny if a pea plant with green pod colour is crossed with a pea plant with yellow pod colour?

1. All offspring with green colour pods only is possible
2. All offspring with yellow colour pods only is possible
3. All offspring with white colour pods only is possible
4. All offspring with green colour pods OR offspring with both yellow and green colour pods is possible

Q. A plant with purple flowers was crossed with white flowers producing 50 plants with only purple flowers. Selfing these plants produced 482 plants with purple flowers and 162 plants with white flowers. What genetic mechanism accounts for these results? Explain. [3]

Q.

What is self-cross in genetics?

Q.

The monohybrid genotypic ratio 1:2:1 in $F_2$ generation indicates

1. Segregation

2. independent assortment

3. dominance

4. incomplete dominance

Q.

According to Mendelism which character shows dominance?

1. Green color in seed coat

2. Terminal position of flower

3. Green pod color

4. Wrinkled seeds

Q.

Explain the following terms with example

(a) Co-dominance

(b) Incomplete dominance

Q. Statement 1: Law of independent assortment can be studied by means of a dihybrid cross
Statement 2: One factor of a character assorts in accordance with the factor of the other character at the time of gamete formation.

1. Both the statements are correct
2. Statement 1 is correct and statement 2 is incorrect
3. Statement 1 is incorrect and statement 2 is correct
4. Both the statements are incorrect

Q.

In a cross between individuals homozygous for (a, b) and wild type (+ +), 700 out of 1000 individuals were of the parental type. Then the distance between a and b is:

1. 70 map unit

2. 35 map unit

3. 30 map unit

4. 15 map unit

Q. Red, green colour blindness is a sex-linked trait. Which of the given statements is not correct regarding colour blindness?

1. Homozygous recessive condition is required for the expression of colourblindness in females
2. Males can be carriers of the trait
3. Colourblind women always have colourblind father and always produce colourblind son
4. It is more common in males than in females

Q. How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

1. Nine
2. Four
3. Three
4. Two

Q. How many types of gametes will be produced by an organism with AaBBCc/AABbCc genotype

1. 3
2. 4
3. 9
4. 6

Q.

A condition, where a certain gene is present in only a single copy in a diploid cell is called:

1. Heterozygous

2. Monogamous

3. Homozygous

4. Hemizygous

Q. Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?

Q. What is test cross? Mention its significance.

Q.

Is isogametes genetically similar?

Q.

Which one of the following individuals can produce sixteen different gametes?

1. AaBbccDd

2. AaBbccDDEeFf

3. AaBbCcddEEFF

4. AaBbCcDDEeFf

Q. Before cell division, the entire DNA content of the cell gets doubled during interphase. This doubling takes place :

1. Somewhere during the middle of the interphase
2. Throughout the interphase
3. At the beginning of the interphase
4. At the end of the interphase

Q. How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

1. Three
2. Four
3. Nine
4. Two

Q. Mention the role of 'genetic mother' in MOET. [1]

Q. How many different kinds of gametes will be produced by a plant having genotype AaBBCcDd?

1. 4
2. 8
3. 16
4. 2

Q. Using a Punnett Square, workout the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

Q. Explain how the laws of segregation and law of independent assortment are different?

Q. Which of the following law was discovered first by Mendel?

1. Law of dominance
2. Law of segregation
3. Law of independent assortment
4. Law of sex determination

Q.

How many different types of gametes will be produced by a plant having genotype AABbCc?

1. 1

2. 2

3. 3

4. 4

Q.

A homozygous tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf plant (t) bearing white (r) flowers.​

​(iii) State the Mendel’s law of independent assortment.​

​

Q.

What will be the number of DNA AND CHROMOSOME respectively after S phase if number of chromosome in root tip cells are 20 -

1)20&20

2)20 & 40

3)40&40

4)40&20