Why is it important for gametes to be haploid? (1 point) Neither parent has the full set of genetic
information so each must contribute their half.
When gametes are made, the diploid cell splits twice, creating four haploid organisms.
They fuse to form a diploid organism so that there is the expected number of chromosomes.
It is impossible for them to be diploid because reproduction does not result in diploidy.
The correct option is: Neither parent has the full set of genetic information so each must contribute their half.
Gametes are the reproductive cells responsible for transmitting genetic information from one generation to the next. They are haploid, meaning they contain half the number of chromosomes compared to other cells in the body which are diploid.
For successful reproduction, it is essential that gametes are haploid because during fertilization, two haploid gametes (one from each parent) fuse to form a diploid zygote. This process ensures that the resulting offspring has the correct number of chromosomes, with half of their genetic material contributed by each parent. If gametes were diploid, then the offspring would end up with a double dosage of genetic material, which could lead to severe developmental abnormalities or other genetic disorders.
The inheritance pattern of one gene will not affect the inheritance pattern of another gene. This is known as (1 point)
independent assortment. random distribution. crossing over.
genetic variation.
The correct option is: independent assortment.
Independent assortment refers to the random and independent segregation of alleles for different genes during the formation of gametes. This means that the inheritance pattern of one gene does not influence or affect the inheritance pattern of another gene. Each gene is inherited independently of other genes, leading to a diverse combination of alleles in offspring, contributing to genetic variation.
Which of the following is a difference between phase I and phase II of meiosis? (1 point)
Phase I results in daughter cells with 23 chromosomes each and phase II with 46 chromosomes each.
Genetic variations can only occur during phase II of meiosis.
Anaphase, metaphase, and telophase only occurs during phase I of meiosis.
Phase I results in two haploid daughter cells and phase II results in four haploid daughter cells.
The correct option is: Phase I results in two haploid daughter cells and phase II results in four haploid daughter cells.
In meiosis, there are two main phases: Meiosis I and Meiosis II. Meiosis I involves the separation of homologous chromosomes, while Meiosis II involves the separation of sister chromatids.
During Meiosis I, the homologous chromosomes pair up and exchange genetic material in a process called crossing over. This results in two daughter cells with half the number of chromosomes as the parent cell, making them haploid.
During Meiosis II, the sister chromatids of each chromosome separate, resulting in four haploid daughter cells. Each daughter cell contains a random assortment of chromosomes, contributing to genetic diversity.
Therefore, the main difference between Phase I and Phase II of meiosis is the number of daughter cells produced. Phase I results in two haploid daughter cells, while Phase II results in four haploid daughter cells.
During meiosis, non-sister chromatids may exchange sections of DNA leading to genetic diversity. What is this process called?
(1 point)
nondisjunction crossing-over independent assortment karyotypes
The correct answer is crossing-over.
Crossing-over is a process that occurs during meiosis where non-sister chromatids of homologous chromosomes exchange sections of DNA. This exchange of genetic material leads to genetic recombination and promotes genetic diversity among offspring. It helps to shuffle and mix the alleles between homologous chromosomes, increasing the variation in genetic combinations passed on to the next generation.