Part A - Processes that determine heredity and contribute to genetic variation
Meiosis guarantees that in a sexual life cycle, offspring will inherit one complete set of chromosomes (and their associated genes and traits) from each parent. The transmission of traits from parents to offspring is called heredity.
Another important aspect of meiosis and the sexual life cycle is the role these processes play in contributing to genetic variation. Although offspring often resemble their parents, they are genetically different from both of their parents and from one another. The degree of variation may be tremendous.

The following processes are associated with meiosis and the sexual life cycle:

DNA replication before meiosis
crossing over
chromosome alignment in metaphase I and separation in anaphase I
chromosome alignment in metaphase II and separation in anaphase II
fertilization

Sort each process into the appropriate bin according to whether it contributes to heredity only, genetic variation only, or both.

-dna replication(assume no errors), -crossing over, -metaphase 1 -> anaphase 1, -metaphase 2 -> anaphase2, -fertilization

hereditary only:
genetic variation only:
both:

Question

harleymustangs3586 harleymustangs3586

11-09-2019
Biology

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Part A - Processes that determine heredity and contribute to genetic variation
Meiosis guarantees that in a sexual life cycle, offspring will inherit one complete set of chromosomes (and their associated genes and traits) from each parent. The transmission of traits from parents to offspring is called heredity.
Another important aspect of meiosis and the sexual life cycle is the role these processes play in contributing to genetic variation. Although offspring often resemble their parents, they are genetically different from both of their parents and from one another. The degree of variation may be tremendous.

The following processes are associated with meiosis and the sexual life cycle:

DNA replication before meiosis
crossing over
chromosome alignment in metaphase I and separation in anaphase I
chromosome alignment in metaphase II and separation in anaphase II
fertilization

Sort each process into the appropriate bin according to whether it contributes to heredity only, genetic variation only, or both.

-dna replication(assume no errors), -crossing over, -metaphase 1 -> anaphase 1, -metaphase 2 -> anaphase2, -fertilization

hereditary only:
genetic variation only:
both:

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arturoyepes arturoyepes · Answer 1 · 2019-09-14T16:04:42+02:00

Answer:

hereditary only: DNA replication, anaphase I,II and metaphase II.

genetic variation only: crossing over, -metaphase 1

both: fertilization

Explanation:

hereditary only: DNA is only copied to have enough for the daughter cells.

Anaphase I, II chromosomes are moving to be inherit to daughter cells.

Metaphase II chromosomes were sorted randomly during metaphase I and will only line up to move to each daughter cell.

Genetic variation only: during crossing over chromosomes exchange information which accounts for DNA variability.

During metaphase I random assortment of chromosomes will create variability too.

Both: during fertilization the newly formed zygote contains different information from both parents (genetic variation), and this information is passed onto the next generation.