A cross produces an offspring phenotype ratio of 1:2:1. What do you know about t

Question

A cross produces an offspring phenotype ratio of 1:2:1. What do you know about the cross? A cross produces an offspring phenotype ratio of 9:3:3:1. What do you know about the cross? A com plant is homozygous for a mutation that results in no color in the kernel (white). The mutation is caused by a D_s transposable element that can jump out of the gene due to the presence of a second element A_c. If D_s jumps out late in development the kernels in this plant will be You discover two new autosomal recessive mutations in Drosophila melanogaster, lacey wings and hairless. A cross between a female heterozygous for both traits and a homozygous recessive male yields the following offspring. What can you conclude about these two genes? In a species of flower red shows incomplete dominance to white, producing pink flowers in the heterozygote and tall (T) is completely dominant to short (t). These two genes assort independently. A cross of individuals heterozygous for both traits is made. How many different phenotypes will be observed among the offspring? Referring to the cross made in question 5, how many different genotypes will be observed among the offspring?

Explanation / Answer

1. The cross shows that the alleles demonstrate incomplete dominance. (a)

2. The cross shows that genes are independently assorting (d).

3. The kernel would completely pigmented. (b)

4. The genes are tightly linked (a)

5. The answer is 9 (c)

6. Total of 16 genotypes will be observed from the cross. (d)

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