Dominant And Recessive Alleles Flashcards
1
Q
How many chromosoms are there in the following
A
Human body cells - 46 ( diploid)
Sperm cell- 23 ( haploid )
Egg cell - 23 (haploid)
2
Q
Why do sex cells contain half the number of chromosomes?
A
Because you inherent hald from each parent . 23 from each to make 46
3
Q
What are the sex chromosomes for the following
Male
Female
A
Male- xy
Female- xx
4
Q
Which are dominant and which are recessive alleles
A
H dominant
h recessive
5
Q
How many alleles would you need to have a disease caused by a recessive allele
A
2 hh
6
Q
What woupd be the possible genotypes of someone who has a dominant disease
A
HH or Hh
7
Q
Give an example for the following alleles
Heterozygous
Homozygous dominant
Homozygous recessive
A
Heterozygous- Hh
Homozygous dominant-HH
Homozygous recessive - hh
