MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Monohybrid Cross

In garden pea...

Question

In garden pea plant, a pure line with round seeds(RR) is crossed with a pure line having wrinkled seeds (rr). The ratio of round seed plants to wrinkled seed plants in $F_{2}$ generation will be?

A

1 : 2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

2 : 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

1 : 3

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

3 : 1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $3 : 1$
A cross between homozygous round seeds plant (RR) and homozygous wrinkled seeds plant (rr) will produce heterozygous (Rr) round seeds plants as F1 generation. The selfing of $F_{1}$ will give $F_{2}$ generation, where there will be one homozygous dominant round seed plant (RR), two heterozygous round seed plants (Rr) and 1 homozygous recessive wrinkled seed plant (rr). Phenotypically, there will be 3 round seed plants and 1 wrinkled seed plant. Hence, the correct answer is ‘3:1’.

Suggest Corrections

thumbs-up

2

Similar questions

Q. A pea plant with round seeds having large starch grains is crossed with another pure pea plant with wrinkled seeds having small starch grains. The

F_{1}

heterozygotes formed are self pollinated. What is the phenotypic ratio of plants with round seeds and intermediate starch grains to plants with wrinkled seeds and larger starch grains expected in

F_{2}

Q. Mendel first crossed pure-bred pea plants having round-yellow seeds with pure-bred pea plants having wrinkled-green seeds and found that only round-yellow seeds were produced in the F₁ generation. When F₁ generation pea plants having round-yellow seeds were cross-bred by self pollination, then peas having round-yellow seeds, round green seeds, wrinkled-yellow seeds and wrinkled-green seeds were produced. Mendel collected a total of 2160 seeds.
(a) What will be the number of (i) round green seeds (ii) wrinkled green seeds (iii) round yellow seeds, and (iv) wrinkled-yellow seeds?
(b) Which 'ratio' as established by Mendel have you made use of in answering the part (a) above?

A cross between pure-bred pea plants having yellow round seeds with those having green wrinkled seeds would produce $F_{1}$ plants with:

Q. When a pure strain of tall plants (TT) with round seeds (RR) is crossed with a pure strain of short plants (tt) with wrinkled seeds (rr), an

F_{1}

generation is produced. The alleles for short and wrinkled are recessive to those for tall and round, respectively. When these

F_{1}

plants self-pollinate, what proportion of the

F_{2}

generation is short with wrinkled seeds?

Q. A tall pea plant with round seeds (TTRR) is crossed with a dwarf wrinkle seeded plant (ttrr). F

_{1}

generation has tall plants with round seeds. What is the proportion of dwarf plants with wrinkled seeds in F

_{2}

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

BIOLOGY

Watch in App

explore_more_icon

Explore more

Monohybrid Cross

Standard X Biology

Join BYJU'S Learning Program

CrossIcon