2. The capital letter G represents the allele in peas that causes uit
dominant trait, gray seed coat. The lower-case letter g represents the
recessive allele that causes the recessive trait, white seed coat. In the
circles, show the alleles in the gametes of the parent generation. Show
how the alleles recombine in the F1 plants. Place your answers in the
space provided below the diagram.
GG
White
Gray
Seed Coat
Seed Coat

The parent generation have genotypes GG (gray seed coat) and gg (white seed coat). The gametes carry one allele. For the GG parent, they all carry Gs (as they are homozygous dominant). For the gg parent, they all carry gs (as they are homozygous recessive).

The F1 generation has to inherit one allele from each parent. They have to inherit a G from the gray seed coat parent, and they have to inherit a g from the white seed coat parent. This means all the offspring will be heterozygous Gg. Because we know G is dominant, they will all have a gray seed coat.

marianaegarciaperedo marianaegarciaperedo · Answer 2 · 2022-03-28T03:51:51+02:00

Germ cells (GG and gg) produce gametes. Each gamete carries one allele of the germ cell (G, G and g, g). Through fertilization, gametes produce the zygote (Gg).

What are the germ cells?

Germ cells are reproductive diploid cells produced by sèxual organs.

They can reproduce by mitosis, through which they form more germ cells. But they can also suffer meiosis giving place to haploid cells.

How are gametes produced?

Each germ cell produces haploid cells through meiosis. These new cells are the gametes.

Each gamete carries one of the alleles of the parental germ cell. This is, if the germ cell's genotype is GG, four gametes will be formed, and each of them will carry one G allele.

How does fertilization occur?

Gametes' destiny is to merge in the process of fecundation, during which a new diploid cell called zygote emerges through fertilization.

The zygote is a complete diploid cell that suffer successive mitosis to form the new organism.

In the exposed example,

Cross:

Parental's germ cell) GG x gg

Gametes) G G g g

Punnett square) G G

g Gg Gg

F1) 100% of the progeny is expected to be heter0zg0us, Gg.

In the attached files you will find the diagram.

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