A plant cell has 3 pairs of chromosomes: a metacentric pair,…
A plant cell has 3 pairs of chromosomes: a metacentric pair, an acrocentric pair, and a telocentric pair. If this plant self-fertilizes, what proportion of the offspring would be expected to have 2 pairs of acrocentric chromosomes in their cells?
Read DetailsIn Neurospora, two genes, g and k, are known to be linked on…
In Neurospora, two genes, g and k, are known to be linked on the same chromosome. Two haploid strains g+ and +k were mated and the diploid was sporulated. The table below contains the types and numbers of octads that were found among the progeny. Which gene is closer to the centromere? Class 1 Class 2 Class 3 Class 4 Class 5 spore 1 g + g k g + + + g k spore 2 g + g k g + + + g k spore 3 g + g k g k + k + + spore 4 g + g k g k + k + + spore 5 + k + + + + g k g + spore 6 + k + + + + g k g + spore 7 + k + + + k g + + k spore 8 + k + + + k g + + k TOTALS 73 17 6 3 1
Read DetailsFlower color in petunia is determined by the alleles of sing…
Flower color in petunia is determined by the alleles of single gene. Purple flowers are fully dominant to white flowers. Suppose a plant homozygous for purple flowers is crossed with a plant that has white flowers. Determine the phenotypes and frequencies of the following: a. The phenotypes and frequencies of the F1 flowers. [answer1] b. The phenotypes and frequencies of the F2 flowers. [answer2] c. The phenotypes and frequencies of the offspring of a cross of the F1 petunias back to the purple parent. [answer3] d. The phenotypes and frequencies of the offspring of a cross of the F1 petunias back to the white parent. [answer4] e. The phenotypes and frequencies (all together) of the offspring of crossing the purple F2 petunias back to the purple parent. [answer5] f. The phenotypes and frequencies (all together) of the offspring of crossing the purple F2 petunias back to the white parent. [answer6]
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