Question

1) Thompson seedless grapes are produced by vines that are triploid. Think about the consequences of...

1) Thompson seedless grapes are produced by vines that are triploid. Think about the consequences of this chromosomal condition for meiosis in the flowers.

a) Why are these grapes seedless?

b) What hormone is most likely being released by the flower to induce the formation of the fruit?

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

If an organism is triploid, the chromosomes can not pair up properly during meiotic division. Bivalents are formed during prophase of meiosis-I. If there are three sets of chromosomes in the cell, chromosomes can not properly align at the metaphase plate and undergo segregation. This often leads to abortive/improper cell division.

a. The grapes are seedless as the meiotic divisions to produce gametes are abnormal. So, the gametes are non-functional and can not produce a fertile zygote. The zygote is the first cell of the sporophytic generation. Since fertilization is improper, seeds can not develop.

b. Parthenocarpy: Development of fruits without fertilization. It is induced by Gibberellic acid.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1.secifically, where are pollen grains produced in the mail reproductive organ? Specifically, where are the egg...
1.secifically, where are pollen grains produced in the mail reproductive organ? Specifically, where are the egg cells made in the female reproductive organ? By which nuclear process (i.e., mitosis or meiosis) are these gametes formed? 2. Seeds come from which part of the flower? Fruit is what part of the flower? The embryo comes from which part of the flower? 3. Which was taller, the stamen or the carpel? Is this important? Why or why not? INFO - Stamen –...
1) In the Cnideria (jelly fish) have neuromuscular (nerve cells) cells in their ectoderm. These cells...
1) In the Cnideria (jelly fish) have neuromuscular (nerve cells) cells in their ectoderm. These cells s evolve into a) the lungs, b) the pancreas and liver, c) the brain and spinal cord system, d) the digestive tract, e) is not important in the process of evolution. 2) The area of the Central Nervous System (CNS) that automatically regulates breathing and heart rate to maintain homeostasis is which of the following? a) Cerebral Cortex b) Medulla oblongata, c) Cerebellum, d)...
QUESTION 1 :The alleles of a particular gene segregate independently into individual gametes (sex cells) during...
QUESTION 1 :The alleles of a particular gene segregate independently into individual gametes (sex cells) during meiosis. True or False QUESTION 2:The DNA sequence of a gene is a phenotype. True or False QUESTION 3:Two diploid individuals, one homozygous and the other heterozygous at a particular gene, make babies. Which of the following statements about the offspring genotype is correct? (Hint: draw Punnett squares) A. All offspring are heterozygotes B. All offspring are homozygotes C. 1/2 of the offspring are...
1.Which of the following is TRUE? a) Genetics is about the genotype. b)Inheritance is controlled by...
1.Which of the following is TRUE? a) Genetics is about the genotype. b)Inheritance is controlled by factors and each offspring receives three factors from each parent. c)Allele pairs never segregate from one another. d)The principle of segregation states that genes for different traits assort independently of one another in the formation of gametes. e)Independent assortment of two traits shows a F2 generation that has a 9:3:3:1 phenotypic ratio. 2.A cross between a black rabbit (BB) and a white rabbit (bb)...
1. What would you predict to be the consequence on DNA replication if the cell had...
1. What would you predict to be the consequence on DNA replication if the cell had a non-functional primase protein? A. There would be no leading strand made. B. There would be no lagging strand made. C. There would be gaps in the leading strand. D. There would be gaps in the lagging strand. E. Two of the above are true. 2. During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a ∆G of -20 kcal/mol. If you...
Can you paraphrase the following rationale for me: Male Reproductive System 1. Which of the following...
Can you paraphrase the following rationale for me: Male Reproductive System 1. Which of the following accurately describes spermiogenesis? a. Occurs before puberty b. Involves stem cells, meiosis, and spermatogenesis c. Involves cytodifferentiation of early spermatids d. Occurs in diploid cells e. Results in the formation of primary spermatocytes Rationale: Spermatogenesis, the first part of sperm production involves mainly mitosis and meiosis and is followed by spermiogenesis, the final differentiation process occurring in the haploid male germ cells. Spermatogenesis begins...
1. A species of flowering plant includes plants with blooms that range from bright golden yellow...
1. A species of flowering plant includes plants with blooms that range from bright golden yellow to very pale yellow; no flowers carrying the yellow pigment allele appear white. The allele for yellow flower color: a. must be a suppressor of another allele. b. demonstrates incomplete penetrance. c. demonstrates variable expressivity. d. must be a modifier of another allele. e. demonstrates variable penetrance. 2. Coat color in mice is determined by two alleles acting at a single locus: B is...
3. Fewer than 1% of all US firms trade outside of the country, and about 60%...
3. Fewer than 1% of all US firms trade outside of the country, and about 60% of those that do so, only trade with one other country. What are some potential reasons for this (all of the following are true, except one): a. Lack of knowledge, data, and experience. b. Most companies in the US are small and medium sized. c. The size of the US consumer market is large, thus companies may be happy to operated domestically only. d....
1. In the path that sperm take, the following are in the correct order: seminiferous tubules,...
1. In the path that sperm take, the following are in the correct order: seminiferous tubules, epididymus, vas deferens, seminal vesicles, prostate gland, bulbourethral gland, spongy urethra. a. true b. false 2. Which of the following is not part of the penis? a. corpus cavernosa b. corpus spongiosum c. corpus luteum d. urethra e. glans 3. Which of the following secretes testosterone? a. spermatogonia b. primary spermatocytes c. secondary spermatocytes d. sustenticular (Sertoli) cells e. interstitial (Leydig) cells 4. Which...
1.   Which is not true about autoclaving? a. Autoclaving requires steam under pressure b. Autoclaving requires...
1.   Which is not true about autoclaving? a. Autoclaving requires steam under pressure b. Autoclaving requires maintaining steam at 121oC and 15 psi for 15 minutes c. It is an effective way to pasteurize milk and other liquids d. Steam must come in contact with the surface of the substance being sterilized 2.     We wished to determine the abundance of bacteria in a sample of milk. To do this ten-fold serial dilutions of a one milliliter milk sample were...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT