Question 22 in trial hsc paper 2006 (1 Viewer)

[Mind-of-mysterY]

Question 22:
b. Gametes are often described as haploid, which means that they have half of the number of chromosomes of a normal body cell.
Explain the significance of this for generating variability in the offspring of a sexually reproducing organism.

c. Describe two other mechanisms that lead to genetic variability in the offspring of a sexually reproducing species.

Please help!

 

[Buiboi]

Question 22:
b. Gametes are often described as haploid, which means that they have half of the number of chromosomes of a normal body cell.
Explain the significance of this for generating variability in the offspring of a sexually reproducing organism.

c. Describe two other mechanisms that lead to genetic variability in the offspring of a sexually reproducing species.

Please help!

b) dont you have to explain the idea of variablity that occurs in gamete production? the idea of random or independed assortment that occurs or perhaps the idea of crossing over, whicih involves the transfer of various traits of one chromosome to another as they line up in the middle and random segregation? or segregation or whatever its called in which the 4 gametes are produced, the idea of many possibilities and combinations that could be grouped together in each gamete increases variability in offspring

c) 2 other mehansims...... probably mutations and .............. what i said before, crossing over or indpendent assorment or random segregation.

 

[zingerburger]

b. The haploid nature of gametes means that they must fuse with a gamete of the opposite sex in order to form a diploid zygote. This means that genetic traits from both parents are transferred to the offspring, which creates variability in the offspring.

 

[xiao1985]

b. The haploid nature of gametes means that they must fuse with a gamete of the opposite sex in order to form a diploid zygote. This means that genetic traits from both parents are transferred to the offspring, which creates variability in the offspring.

Right on.

And it's a feature unique to sexual reproduction. Asexual reproduction allow the production of offsprings with only 1 parent, leading to very few variabilities.

2 mechanisms: crossing over and mutation as bui boi said.