alleles and inheritance of sex

Question 1

what type of chromosomes do males have?

Answer 1

xy

Question 2

what type of chromosomes do females have?

Answer 2

xx

Question 3

chromosomes come in pairs, where does each chromosome come from in a pair?

Answer 3

one from mother, one from father

Question 4

what are alleles?

Answer 4

versions of a gene

Question 5

what does a genotype tell us?

Answer 5

the alleles that are present

Question 6

what is meant by homozygous?

Answer 6

when both alleles are the same

Question 7

what is meant by heterozygous?

Answer 7

when there is 2 different types of alleles e.g. one dominant and one recessive

Question 8

what does a phenotype tell us?

Answer 8

the physical characteristics in an organism

Question 9

describe a dominant allele?

Answer 9

will still show up in phenotype even if only one copy present

Question 10

describe a recessive allele?

Answer 10

will only show up in phenotype if 2 copies are present/ no dominant allele present

Question 11

what are most characteristics a result of?

Answer 11

multiple genes interacting rather then a single gene