Problem to be solved:
In peas, round seed shape (R) is dominant to wrinkled seed shape (r) and yellow seed
color (Y) is dominant to green seed color (y). A pea plant which is homozygous round
seed and has green seed color is crossed with a pea plant that is heterozygous round
seed shape and heterozygous yellow seed color
Directions:
Follow the given steps in the discussion, do the cross using the Punnett square, then
answer the given questions correctly.
Step 1: Read and analyze the given problem
Step 2: RR or Rr =
YY or Yy =
Step 3: Parents genotypes: 5 = RRyy x 0 = RrYy
Step 4: Possible gametes: Ry Ry Ry Ry x RY Ry rY ry
IT =
ys
Step 5: Fill up the Punnett square correctly.
Step 6: Determine genotypic and phenotypic ratios.
Phenotypic ratio:
Genotypic.ratio:
% RRYy,
% RrYy;
% RRyy:
% Riyy
Guide Questions:
1. What are the chances of the offspring being heterozygous for both seed shape and
seed color?
2. What kind of cross is used to show how allelic pair of genes for a specific trait
separates and recombines independently?
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Answer:
1.The Punnett square below makes it clear that at each birth, there will be a 25% chance of you having a normal homozygous (AA) child, a 50% chance of a healthy heterozygous (Aa) carrier child like you and your mate, and a 25% chance of a homozygous recessive (aa) child who probably will eventually die from this ...
2.Genes that are located on the same chromosome are called linked genes. Crossing-over occurs when two homologous chromosomes exchange genetic material during meiosis I. ... The closer together two genes are on a chromosome, the less likely their alleles will be separated by crossing-over.
Explanation:
i hope it helps
pabrainliest po