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oee [108]
3 years ago
7

Plant that has round and yellow seeds (RrYy) is crossed with a plant that has round and yellow seeds (RrYy). What is the ratio o

f the offspring that will have round and yellow seeds?
Biology
2 answers:
nikdorinn [45]3 years ago
6 0

The answer is 9 out of 16 offspring or 56.25 percent.


It is known that the in dihybrid cross (a cross between two different traits), the phenotypic ratio between the offspring, which parents are heterozygous, is 9:3:3:1.

R is an allele for round seeds, r is the allele for wrinkled seeds.

Y is the allele for yellow seeds, and y is the allele for green seeds.

It can be assumed the following:

9 - individuals with both dominant traits (RRYY) - plants with round and yellow seeds.

3 - individuals with the first dominant trait and the second recessive trait (RRyy) - plants with round and green seeds.

3 - individuals with the first recessive trait and the first recessive trait (rrYY) - plants with wrinkled and yellow seeds.

<span>1 - individual with both recessive traits (rryy) - plants with wrinkled and green seeds.</span>

frutty [35]3 years ago
4 0

The correct answer is D) 9:16

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In cattle, codominance of the allele for a red coat (R) and the allele for a white coat (W) results in offspring with a roan coa
mario62 [17]

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Genotype ratio: 1 (RR) : 2 (RW) : 1 (WW)

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Explanation:

Codominance is a kind of inheritance pattern in which both alleles are equally dominant in a gene. This means that both alleles when in a heterozygous state will be simultaneously expressed. According to this question, allele for a red coat (R) and the allele for a white coat (W) results in offspring with a roan coat (RW) in cattle.

Hence, in a cross between a a roan cow (RW) and a roan bull (RW), the following gametes will be produced: R and W.

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Read 2 more answers
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