Homework Answers
Normally in dicot embryo development, the development of embryo is endoscopic type. In the endoscopic, the apex is downward or toward inside. The first division is take place in transverse as a result a basal cell produces towards the micropyle and a terminal cell produces towards chalaza. The cells of the base (basal cell) divides by transverse and the terminal cell divides by a longitudinal division. As a result four celled T-shaped structure is produced called proembryo. The cells from base (basal cell) divide and form suspensor. The suspensor further forms vasicular cell from upper cell and hypophysis from lower. This produces radical and root cap.
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2. Describe the first cell division in Dicot development (i.e., from a one-celled zygote to a...
Examine the frog models 2-5 which represent the 2-cell, 4-cell,.. morula stages. During cleavage, the large...
Examine the frog models 2-5 which represent the 2-cell, 4-cell,.. morula stages. During cleavage, the large zygote (fertilized egg), a single cell, divides (by mitosis) into two cells (2-cell stage); these two cells divide again yielding four (4-cell stage); these four cells divide again yielding eight (8-cell stage); and so on. After dividing a number of times, the embryo is a solid ball of cells, the morula. Just like in the starfish, a cavity (the blastocoel) then becomes visible in...
I just need to fill in the blanks for this paper. If it is too long...
I just need to fill in the blanks for this paper. If it is too long of a question, I understand... just help if you can. Embryogenesis and plant life cycle Plant life cycle shows both similarities and also major differences from animal life cycle. In both cases ……….. (haploid/diploid) (1N/2N) organism goes through to ……….. (mitosis/ meiosis) to produce gametes, but plant life cycle has an extra step in which it produces a ……….. (diploid/haploid) plant before it produces...
4) Development of the cell occurs in 4 steps. In fruit flies, a mutation in the...
4) Development of the cell occurs in 4 steps. In fruit flies, a mutation in the cytoskeleton occurs which prevents the zygote from organizing certain proteins on one side of the embryo, so it is evenly distributed throughout the cell. After undergoing cleavage, the cells do not develop normally, and the embryos die. Which step in the process of cell development was disrupted here? a. Cell determination b. Cell differentiation c. Morphogenesis d. Growth 5) Hair is largely...
chapter 17 section 5 5. Complex development Aa Aa E Every somatic cell in an animal...
chapter 17 section 5
5. Complex development Aa Aa E Every somatic cell in an animal embryo has a complete set of genes that code for the structure of the entire animal. As the embryo develops, certain genes get turned on in certain areas of the embryo to develop limbs, eyes, and so forth. In order for the animal to develop properly, these genes need to be turned on and off in a precise order. Many signals and hormones in...
i believe 2 is correct but mot sure. Need help with the first one too! Some...
i believe 2 is correct but mot sure. Need help with the first
one too!
Some of the genes important in embryonic development are dependent upon the maternal genotype rather than the genotype of the embryo. How does this maternal information get transmitted to the embryo? During egg development, mRNAs transcribed in maternal nurse cells are moved into the embryo During egg development, proteins transcribed and translated in maternal nurse cells are moved into the embryo During egg development, pieces...
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are...
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are in a human somatic cell? 46 chromosomes 3 The term used to refer to this full complement of chromosomes is the 4 How many chromosomes are in human gametes? 5 This is referred to as the number 6 Wa chicken's skin cell has 78 chromosomes, how many chromosomes would the chicken's sperm cell have? 7 How can we distinguish the 23 types of chromosomes...
Binary Fission and Mitosis are similar processes. One way they are different is that: . A....
Binary Fission and Mitosis are similar processes. One way they are different is that: . A. In Mitosis, the DNA does not form into chromosomes. • • • B. In Binary Fission, the DNA does not form into chromosomes. C. Binary Fission only occurs in Eukaryotes. D. They both split by growing a new cell wall. What phase is the indicated cell currently in? D A. Anaphase B. Telophase C. Metaphase D. Prophase • 10 PUNTS When DNA condenses in...
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...
The following figure shows a cell containing a pair of homologous chromosomes. The alleles for the...
The following figure shows a cell containing a pair of
homologous chromosomes. The alleles for the F gene are indicated on
each chromosome. Which of the following most accurately represents
the configuration of chromosomes within the cell following DNA
replication, prior to meiosis?
Select one:
a.
b.
c.
d.
Which term is used to describe a pair of similar chromosomes in
a cell:
Select one:
a. bifurcates
b. homologous
c. chromatids
d. replicants
Which of the following statements is TRUE...
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...
Examine the frog models 2-5 which represent the 2-cell, 4-cell,.. morula stages. During cleavage, the large zygote (fertilized egg), a single cell, divides (by mitosis) into two cells (2-cell stage); these two cells divide again yielding four (4-cell stage); these four cells divide again yielding eight (8-cell stage); and so on. After dividing a number of times, the embryo is a solid ball of cells, the morula. Just like in the starfish, a cavity (the blastocoel) then becomes visible in...
chapter 17 section 5
5. Complex development Aa Aa E Every somatic cell in an animal embryo has a complete set of genes that code for the structure of the entire animal. As the embryo develops, certain genes get turned on in certain areas of the embryo to develop limbs, eyes, and so forth. In order for the animal to develop properly, these genes need to be turned on and off in a precise order. Many signals and hormones in...
i believe 2 is correct but mot sure. Need help with the first
one too!
Some of the genes important in embryonic development are dependent upon the maternal genotype rather than the genotype of the embryo. How does this maternal information get transmitted to the embryo? During egg development, mRNAs transcribed in maternal nurse cells are moved into the embryo During egg development, proteins transcribed and translated in maternal nurse cells are moved into the embryo During egg development, pieces...
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are in a human somatic cell? 46 chromosomes 3 The term used to refer to this full complement of chromosomes is the 4 How many chromosomes are in human gametes? 5 This is referred to as the number 6 Wa chicken's skin cell has 78 chromosomes, how many chromosomes would the chicken's sperm cell have? 7 How can we distinguish the 23 types of chromosomes...
Binary Fission and Mitosis are similar processes. One way they are different is that: . A. In Mitosis, the DNA does not form into chromosomes. • • • B. In Binary Fission, the DNA does not form into chromosomes. C. Binary Fission only occurs in Eukaryotes. D. They both split by growing a new cell wall. What phase is the indicated cell currently in? D A. Anaphase B. Telophase C. Metaphase D. Prophase • 10 PUNTS When DNA condenses in...
The following figure shows a cell containing a pair of
homologous chromosomes. The alleles for the F gene are indicated on
each chromosome. Which of the following most accurately represents
the configuration of chromosomes within the cell following DNA
replication, prior to meiosis?
Select one:
a.
b.
c.
d.
Which term is used to describe a pair of similar chromosomes in
a cell:
Select one:
a. bifurcates
b. homologous
c. chromatids
d. replicants
Which of the following statements is TRUE...
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...
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