Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Justification of Sexual Reproduction by Modified Penna Model of Ageing   We generalize the standard Penna bit-string model of biological ageing by
assuming that each deleterious mutation diminishes the survival probability in
every time interval by a small percentage. This effect is added to the usual
lethal but age-dependent effect of the same mutation. We then find strong
advantages or disadvantages of sexual reproduction (with males and females)
compared to asexual cloning, depending on parameters.

28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics