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प्रश्न
When a cross is made between tall plant with yellow seeds (TtYy) and tall plant with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be:
- Tall and green.
- Dwarf and green.
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उत्तर
Phenotypes of the offspring:
- Tall Yellow: 3
- Tall Green: 3
- Dwarf Green: 1
- Dwarf Yellow: 1
- Proportion of tall and green is 3/8.
- Proportion of dwarf and green is 1/8.
APPEARS IN
संबंधित प्रश्न
Differentiate between the following:
Dominance and Recessive
Given below are the F2 – phenotypic ratios of two independently carried monohybrid crosses :
(i) 1 : 2 : 1
(ii) 3 : 1
Mention what does each ratio suggest.
Explain Mendel’s monohybrid progeny with the help of any one cross.
Mention whether the cross is a monohybrid or dihybrid.
Answer the following question.
Write the basis on which Alfred Sturtevant explained gene mapping.
What is a monohybrid cross? How did Mendel perform this cross?
Differentiate Between Monohybrid and Dihybrid cross.
Name the conditions when both the alleles are identical?
Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in the F1 generation are then selfed to produce F2 generation of pea plants.
What do the plants of the F1 generation look like?
Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in the F1 generation are then selfed to produce F2 generation of pea plants.
What is the ratio of tall plants to dwarf plants in the F2 generation?
Differentiate between inherited and acquired characters. Give one example for each type.
Genotypic ratio of a monohybrid cross is ______.
When a tall plant with rounded seeds (TTRR) is grossed with a Dwarf plant with wrinkled seeds (ttrr) the F1 generation consists of tall plants with rounded seeds. How many types of gametes the F1 plant would produce?
Punnett square is used to know
Cross between hybrid and recessive parent:
In a plant tallness is dominant over dwarfness and red flower is dominant over white. Starting with the parents work out a dihybrid cross. What is standard dihybrid ratio? Do you think the values would deviate if the two genes in question are interacting with each other?
Monohybrid crosses are useful in demonstrating which of the following laws of inheritance suggested by Mendel?
A monohybrid cross is a genetic cross in which how many pair(s) of contrasting characters is/are studied?
Which pair of contrasting characters is studied in the pea plant monohybrid cross?
Which pure-breeding pea plants did Mendel select for plant height?
What is the genotype of the pure dwarf plant selected in the experimental sequence?
What are the phenotype and genotype of all offspring produced by \[TT \times tt\]?
In the first filial generation, what is the observation for the cross \[TT \times tt\]?
Which self-pollination is performed to obtain the F2 generation?
What is the genotypic ratio in F2?
