It is not known what occurs during crossing over. Genes chained together by link

Question

It is not known what occurs during crossing over. Genes chained together by linkage relationships are known collectively as a linkage group. A True B. False The closer two genes are on a chromosome the less likely recombination will occur between them. A. True B. False Recombinant offspring inherit the same allele combinations as their parents had. A. True B. False When using chi square analysis and possibly linked genes, your null hypothesis must be that the genes are not linked. A. True B. False Crossing-over allows the reassortment of linked genes. A. True B. False

Explanation / Answer

Question: 1. Genes chained together by linkage relationships are known collectively as a linkage group

Answer: A. True

Genes nearby on the same chromosome tend to stay together during the formation of gametes, this is called linkage.If two or more genes can be located on the same chromosome and genes that are close together tend to be transmitted as a unit, then the linkage relationships are known collectively as a linkage group,

Question: 2. The closer two genes are on a chromosome the less likely recombination will occur between them.

Answer: A. True

Genes that are closer together undergo fewer crossing over events and non-crossover gametes will exceed than the number of crossover gametes. If two genes are far apart on the chromosome, crossover and non-crossover events will occur in equal frequency.

Question: 3. Recombinant offspring inherit the same allele combinations as their parents had.

Answer: B. False

Offspring that have inherited the same combinations of alleles as their parents are known as parental or non-recombinant offspring. Non-parental or recombinant offspring have combinations of traits that are different from those of either parents.

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