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Question
Define the following:
Heterozygous
Solution 1
Heterozygous - Diploid condition where both the alleles are different is called heterozygous.
Solution 2
Heterozygous: An individual possessing contrasting (dissimilar) alleles for a particular trait is called heterozygous. It is a hybrid and does not breed true for that trait. e.g. Tt
RELATED QUESTIONS
A pea plant pure for yellow seed colour is crossed with a pea plant pure for green seed colour. In the F1 generation all pea plants were with yellow seeds. Which law of Mendel is applicable?
State the three Mendel’s laws of inheritance.
In Mendel’s experiments, tall pea plants (T) are dominant over dwarf pea plants (t).
Draw a Punnett square board to show the gametes and offspring when both the parents are heterozygous for tallness.
State Mendel's law of dominance.
Suppose you are given two pairs of contrasting characters: Seed colour → yellow and green , seed coat → round and wrinkled.
Fill in the following table to show that F2 generation according to the principle of independant assortment as given by Mendel.
| Selfing among hybrids of F1 | RY | Ry | rY | ry |
| RY | ||||
| Ry | ||||
| rY | ||||
| Ry | ||||
| F2 generation |
Choose the correct answer:
If any of Mendel's characters were linked; one would have been unable to derive.
Choose the correct answer:
The contrasting characters used by Mendel are called _____
If a pure tall plant is crossed with a pure dwarf plant, then offspring will be ______.
Explain the following term : Homozygous
State whether the following statement is true or false:
The dominant character masks the recessive character.
Give Technical Term:
The hereditary unit, which is responsible for inheritance.
Why law of segregation is also called the law of purity of gametes?
Dominant allele refers to ______.
The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes?
Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following:
- Round, yellow
- Round, green
- Wrinkled, yellow
- Wrinkled, green
Read the following and answer from given below:
Prashant wanted to find the genotype of a pea plant bearing purple coloured flowers in his kitchen garden. For this, he crossed purple-flowered plants with white-flowered plants. As a result, all plants which were produced had purple flowers only. Upon selfing these plants, 75 purple flower plants and 25 white flowers plants were produced. Now, he can determine the genotype of a purple-flowered plant by crossing it with a white-flowered plant.
The character i.e., the purple colour of the flowers that appeared in the first filial generation is called ______
Mendel selected pea as material for his experiments because:
Enumerate the cause and the characteristic symptom of PKU.
