Question and answer
What would happen to the possible variation in gametes if the number of chromosome pairs increased from two to three? What if the number increased again from three to four?
The mechanisms that lead to genetic variations in gametes are segregation and independent assortment of chromosomes, crossover of homologues and gene recombination, and random fertilization. [ Segregation implies that the members of the allele pair determining each trait are distributed to different gametes during meiosis. Independent assortment of chromosomes means that alleles for the same
trait are distributed independently of each other. The net result is that each gamete has a single allele for each trait, but that allele represents only one of the four possible parent alleles. Crossover of homologues and gene recombination implies that two of the four chromatids in a tetrad take part in crossing over and recombination, but these two may make many crossovers during synapsis. Paternal chromosomes can precisely exchange gene segments with the homologous maternal ones, giving rise to recombinant chromosomes with mixed contributions from each parent. Random fertilization implies that a single human egg will be fertilized by a single sperm on a totally haphazard basis. ]
Expert answered|blackpearl|Points 22|
Question
Asked 1/29/2013 12:49:40 AM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
How many different combinations of chromosomes could there be in the gametes if a diploid cell has two pairs of homologous chromosomes ?
Weegy: I will assume that you mean human cells. Somatic cells are diploid (2n), containing two sets of chromosomes, one of paternal, one of maternal origin. Gametes, on the other hand, are haploid (n), with a single set of chromosomes, ie. [ half as many as the somatic cell. Now, the haploid chromosome number (n) is characteristic of the species, and in humans this number happens to be 23. Therefore a human gamete has 23 chromosomes, and a human somatic cell 23 pairs, or 46 chromosomes. ] User: A diploid cell has two pairs of homologous chromosomes. How many different combinations of chromosomes could there be in the gametes? (More)
Question
Expert Answered
Asked 1/29/2013 12:47:59 AM
0 Answers/Comments
How can independent assortment help explain genetic diversity in humans? Hint: How many pairs of chromosomes are in a human diploid cell?
Weegy: Genetic diversity, the level of biodiversity, refers to the total number of genetic characteristics in the genetic makeup of a species. [ It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary. [ Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess variations of alleles that are suited for the environment. Those individuals are more likely to survive to produce offspring bearing that allele. The population will continue for more generations because of the success of these individuals.[1] The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions. Diversifying selection is the hypothesis that two subpopulations of a species live in different environments that select for different alleles at a particular locus. This may occur, for instance, if a species has a large range relative to the mobility of individuals within it. Frequency-dependent selection is the hypothesis that as alleles become more common, they become more vulnerable. This is often invoked in host-pathogen interactions, where a high frequency of a defensive allele among the host means that it is more likely that a pathogen will spread if it is able to overcome that allele. human, besides defected ones, has a total of 46 chrosomes haploid(23) + haploid(23)=Diploid(46). Hope this helped for more information about this subject I would suggest going to a website that deals with Biology and human cells I would look up somatic cells(normal cells). ] (More)
Question
Expert Answered
Asked 1/29/2013 12:59:47 AM
0 Answers/Comments
19,776,867 questions answered
Popular Conversations
Simplify 8(x + 6) - 10 User: Simplify 8(R + 6) - 2R. User: Simplify ...
Weegy: The answer is x^2 User: Simplify 12 + 3(2x - 3) + 4. Weegy: 12 + 3(2x - 3) + 4. = 12 + 6x - 9 + 4; = 6x + ...
3/3/2015 12:14:01 PM| 14 Answers
t Object]User: Write 5,000,039 in scientific notation. User: Find ...
Weegy: Here are some characteristics of grace and forgiveness: patience, kindness, mercy, unconditional love, empathy, ...
3/3/2015 11:59:55 AM| 8 Answers
What is the midpoint of a segment whose endpoints are (14, 7) ...
Weegy: The midpoint of the line segment whose endpoints are (3, 10) and (7, 8) is: (-2, 5). M = [(x2 + x1)/2] , [(y2 + ...
3/3/2015 10:30:58 AM| 7 Answers
The sum of the interior angles of a quadrilateral equals 360°.
Weegy: The sum of the interior angles of a quadrilateral equals 360 . This is TRUE. User: An exterior angle of a ...
3/3/2015 7:02:05 AM| 5 Answers
Simplify (-7/8)(-3/4).
Weegy: (-7/8) * (-3/4) = 21/32; User: Simplify (3/10)(-5/9). Weegy: (3/10) * (-5/9) = -15/90; = -1/6 User: ...
3/3/2015 9:37:06 AM| 5 Answers
Evaluate 5x3 + 2 for x = -1.
Weegy: 5(-1)^3 + 2 = -5 + 2 = -3 . which is B User: Simplify 9 - {x - (7 + x)}. User: Simplify 6r · s · 4rt. ...
3/3/2015 12:50:12 PM| 4 Answers
Which of the following equations is the translation 2 units up of the ...
Weegy: The following equation that is the translation 2 units down of the graph of y = |x| is y = |x| - 2. User: If ...
3/3/2015 9:03:04 AM| 3 Answers
Simplify 7(A - 6). User: Simplify 0.05x + 1.02x. User: Simplify ...
Weegy: b(a + b) - a(a - b) = ab + b^2 - (a^2 - ab) = ab + b^2 - a^2 + ab = 2ab + b^2 - a^2 User: Simplify 10x - 3x ...
3/3/2015 10:41:26 AM| 3 Answers
Simplify 6(x + 4). User: Simplify 12A + 2 + A - 1. User: Simplify ...
Weegy: If you Factor 2n+4, the answer would be 2(n+2).
3/3/2015 10:45:11 AM| 3 Answers
Which of the following values is farthest to the left on the number ...
Weegy: The value farthest to the left on the number line is 2. User: Find the value of 21 + 4(32 - 5). Weegy: 3-3 ...
3/3/2015 12:37:15 PM| 3 Answers
What is the equation of the line that passes through (4, -1) and (-2, ...
Weegy: y = (-2/5)x - 2 User: What is the equation of the line that passes through (-3, -1) and has a slope of ? ...
3/3/2015 3:06:50 PM| 3 Answers
Having a realistic pride in one’s abilities, accomplishments and ...
Weegy: Having a realistic pride in one s abilities, accomplishments and goals is known as Self-efficacy User: 'A ...
3/3/2015 12:28:10 AM| 2 Answers
Weegy Stuff
S
L
P
L
P
P
P
Points 225 [Total 8111]| Ratings 0| Comments 225| Invitations 0|Offline
S
P
C
L
P
L
1
P
Points 61 [Total 7368]| Ratings 0| Comments 61| Invitations 0|Offline
S
1
L
L
Points 52 [Total 7553]| Ratings 0| Comments 52| Invitations 0|Offline
S
1
Points 36 [Total 947]| Ratings 0| Comments 36| Invitations 0|Offline
S
Points 22 [Total 390]| Ratings 0| Comments 22| Invitations 0|Offline
S
Points 17 [Total 108]| Ratings 0| Comments 17| Invitations 0|Offline
S
Points 11 [Total 127]| Ratings 1| Comments 1| Invitations 0|Offline
S
Points 10 [Total 10]| Ratings 1| Comments 0| Invitations 0|Offline
S
Points 10 [Total 240]| Ratings 1| Comments 0| Invitations 0|Offline
S
Points 9 [Total 9]| Ratings 0| Comments 9| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.