Question

У суниць плоди можуть бути червоними (АА), білими (аа) або рожевими (Аа), а чашечка – нормальною (ВВ), листкоподібною (bb) і проміжною (Вb). Схрестили між собою рослини з рожевими плодами й проміжною чашечкою. Яка частина потомства матиме:е) червоні плоди й листкоподібну чашечку?

Answer 1

Ответ:

1/16

Объяснение:

AA -- красные плоды;

Aa -- розовые плоды;

aa -- белые плоды;

BB -- нормальная чашечка;

Bb -- чашечка промежуточной формы;

bb -- листовидная чашечка.

Согласно условию между собой скрещивают растения с розовыми плодами и чашечками промежуточной формы.

P: AaBb                         x AaBb

G: AB,Ab,aB,ab                AB,Ab,aB,ab

F1: см. решётку Пеннета.

Растения с красными плодами и листовидной чашечкой будут иметь генотип AAbb (выделен синим). Они составляют 1/16 часть от всего вероятного потомства.

#SPJ1

Answer 2

Inheritance Patterns in Strawberries

When it comes to strawberries, the color of the fruit and the shape of the calyx (the green leaf-like structure at the top of the fruit) are determined by specific genes. In this case, we have three different genes involved: one for fruit color (A), one for calyx shape (B), and one for calyx color (C).

The gene for fruit color has two alleles: A (which produces red fruit) and a (which produces white fruit). The gene for calyx shape also has two alleles: B (which produces a normal calyx) and b (which produces a leaf-like calyx). Finally, the gene for calyx color has two alleles: C (which produces a normal calyx color) and c (which produces an intermediate calyx color).

When two strawberry plants are crossed, their offspring inherit one allele from each parent for each gene. The possible combinations of alleles determine the characteristics of the offspring.

Cross between Plants with Pink Fruit and Intermediate Calyx

In this case, we are crossing plants with pink fruit (Aa) and an intermediate calyx (Bb). Let's determine the possible combinations of alleles and the resulting characteristics of the offspring.

For the fruit color gene: - The parent with pink fruit has the genotype Aa. - The other parent's genotype is not specified, so we'll assume it is also Aa.

When two plants with the genotype Aa are crossed, the possible combinations of alleles in the offspring are: AA, Aa, and aa. This means that the offspring can have red fruit (AA or Aa) or white fruit (aa).

For the calyx shape gene: - The parent with an intermediate calyx has the genotype Bb. - The other parent's genotype is not specified, so we'll assume it is also Bb.

When two plants with the genotype Bb are crossed, the possible combinations of alleles in the offspring are: BB, Bb, and bb. This means that the offspring can have a normal calyx (BB or Bb) or a leaf-like calyx (bb).

Determining the Characteristics of the Offspring

Now, let's combine the possible combinations of alleles for the fruit color and calyx shape genes to determine the characteristics of the offspring.

Possible combinations of alleles for fruit color (A) and calyx shape (B): - AA + BB: Red fruit and normal calyx - AA + Bb: Red fruit and normal calyx - AA + bb: Red fruit and leaf-like calyx - Aa + BB: Red fruit and normal calyx - Aa + Bb: Red fruit and normal calyx - Aa + bb: Red fruit and leaf-like calyx - aa + BB: White fruit and normal calyx - aa + Bb: White fruit and normal calyx - aa + bb: White fruit and leaf-like calyx

Based on these combinations, we can see that the offspring can have red fruit with either a normal calyx or a leaf-like calyx. The white fruit is not possible in this cross.

To summarize, the offspring from crossing plants with pink fruit and an intermediate calyx will have red fruit and either a normal calyx or a leaf-like calyx.

Note: The inheritance patterns described here are based on the information provided and assume that the genes for fruit color and calyx shape are not linked or influenced by other genes.