Chapter 13 Meosis and the Sexual Life Cycles
Ignoring crossover, how many kinds of gametes can be produced by an organism with a diploid number of eight
16
The egg of a rabbit contains 22 chromosomes. How many chromosomes are in the somatic cells of a rabbit
44
Somatic cells in animals differ from gametes in that somatic cells ______
Are all of the cells of the body except for the gametes and their purcursors
Sister chromatids differ from nonsister chromatids in that sister chromatids__________
Are products of the S phase of the cell cycle and our two copies of one chromosome
A clone is the product of________
Asexual reproduction and mitosis
____________ are a group of genetically identical individuals produced by a process called__________
Clones, asexual reproduction
Somatic cells in humans differ from gametes in that human somatic cells________
Contain two sets of each of the 23 chromosome types
Regardless of whether an organism is an animal, a plant, a fungus, or an algal cell, all zygotes are _______ and are formed during the _______ of two gametes
Diploid fertilization haploid
Regarding the role of cohesion pro team in maintaining cohesion between sister chromatids, which of the following statements is false?
During meosis II, cohesion holds sister chromatids together along their lengths as the second mitotic spindle forms
Darwin realize the importance of heritable variation to evolution
Even though he never read any of Gregor Mandel's work
What is the result when a diploid cell undergoes meosis
Four haploid cells
A life cycle in which the only multicellular form is haploid is most typical of ________
Fungi
Allelic variation is an important source of ________ in a population
Genetic diverse city
A pair of genetic structure is carrying genes that control the same inherited characters are called_________
Homologous chromosomes
Characteristic of the bdelloid rotifer is that
Is an example of an animal that has not reproduce sexually and 40 million years
The major contribution of sex to evolution is that
It provides a method to increase genetic variation
The process called _________ reduces the chromosome number by __________
Meosis, two consecutive cell divisions
Which life cycle stage is found in plants but not animals
Multicellular haploid
Which of the following is a function of mitosis and humans
Multiplication of body cells
In meosis, _______ of ______ crossover and form________
Non-sister chromatids, homologous pairs, chiasmata
Unless the chromosomes were stained to show band patterns, a karyotype would be least likely to show which of the following?
Part of the chromosome turned around
The zipper like complex that forms in meosis occurs during _____ and is called the ________
Prophase one, synaptonemal complex
How many genes are present in the human genome
Tens of thousands
Which of the following statements about homologous chromosomes is correct
They have jeans for the same traits at the same Loci
At the end of mitosis,________ daughter cells that are genetically__________ are formed, while at the end of meosis, _______ daughter cells that are generally _______ are formed
Two identical four distinct
Which of the following occurs in meosis, but not mitosis
Homologous chromosomes separate
What is a locus
The precise location of a gene on a chromosome
The lifecycle called _______ in plants has two multicellular stages. The ______ and the ______
Alternation of generations, haploid gameophyte, diploid sporophyte
Genetic diversity requires _______
Sexual reproduction, independent assortment, crossing over between nonsister chromatids of homologous chromosomes, and random fertilization
Somatic cells in humans contain ______ sets of chromosomes and are therefore termed ______
Two; diploid
