Which of these statements is false?
Which of these statements is false?
In humans, each of the 22 maternal autosomes has a homologous paternal chromosome.
Single, haploid (n) sets of chromosomes in ovum and sperm unite during fertilization, forming a diploid (2n), single-celled zygote.
At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
In humans, the 23rd pair, the sex chromosomes, determines whether the person is female X) or male (XY).
Sexual life cycles differ with respect to the relative timing of meiosis and fertilization. Answer:D
Homework Answers
Here, the false statement is :
At sexual maturity, ovaries and testes produce diploid gametes by meiosis. After meiosis, always haploid (n) gamete cells are produced. Hence, meiosis is known as reduction division. So, this statement is false.
Concept 13.2: Fertilization and meiosis alternate in sexual life cycles
Concept 13.2: Fertilization and meiosis alternate in sexual life cycles Chromosomes - karyotype - homologous chromosomes (homologs) - sex chromosomes vs. autosomes - haploid vs. diploid Life cycle (gametes/fertilization/zygote/adult) - meiosis Concept 13.3: Meiosis reduces the number of chromosome sets from diploid to haploid Meiosis 1 - Prophase 1 synapsis/crossing over
Over Prophase 1 & Prophase 2 and independent Assortment in Prophase 1 only Sperm fertilizing erg...
Over Prophase 1 & Prophase 2 and independent Assortment in Prophase 1 only Sperm fertilizing erg in Telophase 2 and zygote formation after Cytokinesis 2 Question 3 1 pts Pg 99. Why is it essential that each gamete receive only one set of chromosomes, in other words. why must gametes be haploid? Because a haploid gamete can then fuse with a diploid egg or diploid sperm which promotes fertilization and development of a zygote. Because when gametes fuse in fertilization,...
Solve these 10 questions 11.Fill in the blanks. Suppose a cell at the end of S-phase...
Solve these 10 questions 11.Fill in the blanks. Suppose a cell at the end of S-phase has 48 chromatids. At the end of mitosis, each cell produced would have ______ chromosomes and ______ chromatids. 48, 96 24, 12 48, 48 24, 24 24, 48 12.Fill in the blanks. Suppose a cell at the beginning of meiosis has 36 chromosomes. This cell has ________ chromatids. At the end of meiosis, each of its "daughter cells" will have _________ chromosomes. 72, 18...
20. How many cells are formed at the end of Meiosis I & how many copies...
20. How many cells are formed at the end of Meiosis I & how many copies of chromosomes does each cell have?_ 21. Is DNA copied before Meiosis II? _ 22. How many cells form at the end of Meiosis II and how many chromosomes do they contain? • 23. Oogenesis ultimately gives rise to (one ovum, four ova) with the Chaploid, diploid) number of chromosomes. 24. A sperm cell is a (gamete, zygote), and is (haploid, diploid). 25. When...
Match the following terms related to the human life cycle. Group of answer choices Haploid -...
Match the following terms related to the human life cycle. Group of answer choices Haploid - Diploid- Gamete- Mitosis- Meiosis- Fertilization- Zygote- Crossing over- Synapsis- Somatic cells- Gonad cell- Karyotype- Matching choices a. ordered display of an organisms chromosomes. b. cell with pairs of homologous chromosomes, 2n c. division of nuclei, ending with two 2n cells d. fusing of egg and sperm e. non-sex cells f.pairing of homologous chromosomes during prophase I g. cell with a single set...
3. A diploid cell with eight chromosomes undergoes meiosis. (7 pt) a. How many chromosomes are...
3. A diploid cell with eight chromosomes undergoes meiosis. (7 pt) a. How many chromosomes are there in each cell after meiosis I? How many daughter cells are made after meiosis I? Are the daughter cells diploid or haploid? (1.5 pt) How many chromosomes are there in each cell after meiosis ll? How many daughter cells are made after meiosis II? Are the daughter cells diploid or haploid? (1.5 pt) What two mechanisms allow genetic variation among the gametes produced...
produce haploid gametes; then those gametes can fuse to form a diploid zygote. 35. What is...
produce haploid gametes; then those gametes can fuse to form a diploid zygote. 35. What is another purpose of meiosis other than stated in the question above? 36. How many cell divisions are involved in meiosis? (two) Do the cells also go through 37. What are homologous chromosomes? Do they contain the same alleles (different 38. How do homologous chromosomes line up on the metaphase plate in meiosis 1? How do 39. Understand the basic steps of meiosis. Please use...
Diploid Diploid Start Go 46 46 These in essence are the products of mitosis, and meiosis....
Diploid Diploid Start Go 46 46 These in essence are the products of mitosis, and meiosis. Draw the steps of mitosis and meiosis in a cell containing only 4 chromosomes (2 pairs). These chromosomes are differentiated Mitosis . vs. Meiosis End (46 Paternal copy (from father) . TID MID (23) (23) (23) (23) Diploid Maternal copy (from mother) Haploid Homologous pair (chromosome 1) Homologous pair (chromosome 2) By color Based on which parent they originate from. Use this color scheme...
The process of sexual reproduction versus several forms of parthenogenesis sexual reproduction haploid parthenogenesis diploid parthenogenesis...
The process of sexual reproduction versus several forms of parthenogenesis sexual reproduction haploid parthenogenesis diploid parthenogenesis meiosis meiosis automixis meiosis apomixis mitosis oocyte (immature female egg cell) spermatocyte (male sperm cell) oocyte oocyte female egg cell diploid zygote chromosome replication fuse with other oocyte haploid zygote (2n 2n diploid egg develops into diploid individual diploid zygote develops into haploid individual haploid (2n) diploid develops into diploid individual develops into diploid individual © Encyclopædia Britannica, Inc. Answer the questions below in...
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2....
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2. Assume chromosome! is clearly larger than chromosome 2. Each chromosome pair contains a maternal and a paternal member (e.g. 1 and 1 & 2 and 2"). An allele called G is localized to 1" whereas an allele called g is on chromosome 1P. Allele R is localized to 2m whereas alleler is localized to 2. Using these designations and clearly drawn and labeled chromosomes,...
Over Prophase 1 & Prophase 2 and independent Assortment in Prophase 1 only Sperm fertilizing erg in Telophase 2 and zygote formation after Cytokinesis 2 Question 3 1 pts Pg 99. Why is it essential that each gamete receive only one set of chromosomes, in other words. why must gametes be haploid? Because a haploid gamete can then fuse with a diploid egg or diploid sperm which promotes fertilization and development of a zygote. Because when gametes fuse in fertilization,...
20. How many cells are formed at the end of Meiosis I & how many copies of chromosomes does each cell have?_ 21. Is DNA copied before Meiosis II? _ 22. How many cells form at the end of Meiosis II and how many chromosomes do they contain? • 23. Oogenesis ultimately gives rise to (one ovum, four ova) with the Chaploid, diploid) number of chromosomes. 24. A sperm cell is a (gamete, zygote), and is (haploid, diploid). 25. When...
3. A diploid cell with eight chromosomes undergoes meiosis. (7 pt) a. How many chromosomes are there in each cell after meiosis I? How many daughter cells are made after meiosis I? Are the daughter cells diploid or haploid? (1.5 pt) How many chromosomes are there in each cell after meiosis ll? How many daughter cells are made after meiosis II? Are the daughter cells diploid or haploid? (1.5 pt) What two mechanisms allow genetic variation among the gametes produced...
produce haploid gametes; then those gametes can fuse to form a diploid zygote. 35. What is another purpose of meiosis other than stated in the question above? 36. How many cell divisions are involved in meiosis? (two) Do the cells also go through 37. What are homologous chromosomes? Do they contain the same alleles (different 38. How do homologous chromosomes line up on the metaphase plate in meiosis 1? How do 39. Understand the basic steps of meiosis. Please use...
Diploid Diploid Start Go 46 46 These in essence are the products of mitosis, and meiosis. Draw the steps of mitosis and meiosis in a cell containing only 4 chromosomes (2 pairs). These chromosomes are differentiated Mitosis . vs. Meiosis End (46 Paternal copy (from father) . TID MID (23) (23) (23) (23) Diploid Maternal copy (from mother) Haploid Homologous pair (chromosome 1) Homologous pair (chromosome 2) By color Based on which parent they originate from. Use this color scheme...
The process of sexual reproduction versus several forms of parthenogenesis sexual reproduction haploid parthenogenesis diploid parthenogenesis meiosis meiosis automixis meiosis apomixis mitosis oocyte (immature female egg cell) spermatocyte (male sperm cell) oocyte oocyte female egg cell diploid zygote chromosome replication fuse with other oocyte haploid zygote (2n 2n diploid egg develops into diploid individual diploid zygote develops into haploid individual haploid (2n) diploid develops into diploid individual develops into diploid individual © Encyclopædia Britannica, Inc. Answer the questions below in...
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2. Assume chromosome! is clearly larger than chromosome 2. Each chromosome pair contains a maternal and a paternal member (e.g. 1 and 1 & 2 and 2"). An allele called G is localized to 1" whereas an allele called g is on chromosome 1P. Allele R is localized to 2m whereas alleler is localized to 2. Using these designations and clearly drawn and labeled chromosomes,...
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