A tall violet flowered plant (TTVV) is crossed with a dwarf white flowered plant (ttvv). When the $F_{1}$ plants are self pollinated, a total of 1600 $F_{2}$ plants are produced. Among them, how many plants are tall with white flowers?

900

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600

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300

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100

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Solution

The correct option is C
300

This is a typical dihybrid cross. Both parents are homozygous, so two different types of gametes will be formed- (TV) and (tv) respectively. The $F_{1}$ plant will be heterozygous with the genotype (TtVv). Four different gametes are formed by the $F_{1}$ plants- (TV), (Tv), (tV), (tv).

As you can see from the Punnett tool, the phenotypes in the $F_{2}$ progeny are observed in a 9:3:3:1 ratio. Among these, tall plants with white flowers are one (TTvv) and two (Ttvv), thus a total of 3- recombinants which are produced 3 times in every 16 progenies. Hence out of 1600 plants, $\frac{3}{16} * 1600 = 300$ are tall plants with white flowers.

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A tall violet flowered plant (TTVV) is crossed with a dwarf white flowered plant (ttvv). When the $F_{1}$ plants are self-pollinated, a total of 1600 $F_{2}$ plants are produced. How many plants of $F_{2}$ generation are similar to the original parents in terms of both genotype and phenotype?

Question 1
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic makeup of the tall parent can be depicted as
(a) TTVV
(b) TTvv
(c) TtVV
(d) TtVv

Question 1
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic makeup of the tall parent can be depicted as
(a) TTVV
(b) TTvv
(c) TtVV
(d) TtVv

Q. A tall plant with red flowers is crossed with a dwarf plant with white flowers. Which one of the following represents dwarf plant with white flowers?

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:

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A tall violet flowered plant (TTVV) is crossed with a dwarf white flowered plant (ttvv). When the F1 plants are self pollinated, a total of 1600 F2 plants are produced. Among them, how many plants are tall with white flowers?

A tall violet flowered plant (TTVV) is crossed with a dwarf white flowered plant (ttvv). When the $F_{1}$ plants are self pollinated, a total of 1600 $F_{2}$ plants are produced. Among them, how many plants are tall with white flowers?