Question

When maternal and paternal chromosomes fail to separate correctly during meiosis leading to defective chromosome number...

When maternal and paternal chromosomes fail to separate correctly during meiosis leading to defective chromosome number in gametes, it is called...... Select one: a. homologous recombination b. gene conversion c. independent assortment d. transposition e. nondisjunction

Homework Answers

Answer #1

Answer is E - non disjunction

During Nondisjunction pair of homologous chromosomes fail to separate during anaphase stage so that both chromosomes of the pair pass to one daughter cell.

Disorders caused due to Nondisjunction are trisomy 21 (Down syndrome) and monosomy X (Turner syndrome).

Down's syndrome - A genetic disorder caused by the presence of third copy of chromosome 21. Symptoms include growth retardation and intellectual disability

Turner syndrome is caused when one of the X chromosomes is missing.  It result in the failure of the ovaries to develop, short height and severe heart diseases.

Nondisjunction also leads to early spontaneous abortions.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
During meiosis what is the process that creates new combinations of alleles along a single chromosome?...
During meiosis what is the process that creates new combinations of alleles along a single chromosome? crossing over meiosis II nondisjunction independent assortment During which stage of meiosis do chromosomes align on the equator of a haploid cell? metaphase metaphase I metaphase II What creates different combinations of maternal and paternal chromosomes in an organism's gametes (i.e. its sperm or eggs)? In other words, this is why all sperm (or eggs) are not genetically identical, and why you look different...
-Mitosis & Meiosis Review Matrix Place an X or color in the box to indicate if...
-Mitosis & Meiosis Review Matrix Place an X or color in the box to indicate if the event occurs during Mitosis, Meiosis, or both.  Hint: when the chart refers to a specific phase, such as Prophase, consider all events: Mitosis, Meiosis 1, Meiosis 2. Event Mitosis Meiosis Both 1. Ends with diploid cells 2. Ends with haploid cells 3. Two cell divisions 4. One cell division 5. Ends with two daughter cells 6. Ends with four daughter cells 7. Used for...
Question 11 pts ________________ is a specific version of a gene on a homologous chromosome that...
Question 11 pts ________________ is a specific version of a gene on a homologous chromosome that has a corresponding version of a similar gene on a homologous chromosome. For example, hair color gene (ie. red from mom) will be on one homologous chromosome and a possibly different version of hair color gene (ie. black from dad) will be on the other corresponding homologous chromosome. chromosome allele chromatin genome Flag this Question Question 21 pts A ___________ is how you write...
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. 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...