Extra sets 4-7 Questions

Question 1

Two individuals from 2 different species are bred together. One has 2n=38, the other has 2n=62. What outcome would you expect from this mating?

Answer 1

possible fertile offspring but vary unlike due to difference in number

Question 2

how many DNA molecules are in one chromtids ? a chromsomes ?

Answer 2

in a chromtids its 1 DNA molcule in a chromsome its 2

Question 3

Recombination involves the genetic exchange between which parts of a chromosomes?

Answer 3

non-sister chromatids of homologous chromosomes

Question 4

Some of the cells in a single organism have 22 chromosomes and some have 21 chromosomes and some have 23 chromosomes. How could this situation arise?

Answer 4

nondisjunction events during mitosis in some somatic cells in the developing embryo

Question 5

The probability of producing an aneuploid offspring is greatest for a nondisjunction event in what stage(s) of meiosis? ( most fucked up outcome)

Answer 5

nondisjunction in meiosis I

Question 6

where does x inactivation happen ?

Answer 6

in an early embyro

Question 7

humans 2n=46 ,total chromsomes in humans

Question 8

A diploid cell where 2n=10 is about to enter anaphase, how many chromatids are present in the cell?

Answer 8

20

Question 9

how many sex chromsomes does a germ cell have ?

Answer 9

2

Question 10

how many sex chromsomes does a gamete have ?

Answer 10

1

Question 11

how many sex chromsomes does a somatic cell have ?

Answer 11

2

Question 12

how many sex chromsomes does a zygote have ?

Answer 12

2

Question 13

what is the max alleles for normal person

Answer 13

2

Question 14

what is the max for someone with trisomy 21

Answer 14

2 and 4