In pea plants, purple flowers are dominant over white flowers. The phenotype ratio of purple to white flowers in a population of
five plants is 4:1. How many plants have white flowers? 1
2
4
5
----------
In some lizard species, a short tail is recessive and a long tail is dominant. According to the principle of dominance:
a lizard with a TT genotype will have a short tail
a lizard with a tt genotype will have a long tail
a lizard with a Tt genotype will have a short tail
a lizard with a tt genotype will have a short tail
1. 1 Since the ratio is purple flowers to white flowers, and the ratio is 4:1 out of 5 plants, there is 1 white flower. Remember that, in a ratio, the first number is the first one mentioned, and the second number is the second one mentioned.
2. A lizard with a tt genotype with have a short tail Since the short tail is recessive, it can be represented with a lowercase letter (t), and since the long tail is dominant, it can be represented with a capital letter (T). Because the long tail gene is dominant, if even one capital T is present in a genotype, the lizard will have a long tail. You can label the different kinds of genotypes if it helps.
TT - long tail, since both genes are for a long tail Tt - long tail, since one gene is for a long tail, and the long tail is dominant tt - short tail, since both genes are for a short tail
The primary difference between the periodic and perpetual inventory system is that the perpetual system keeps track of things from the start to finish continuously while the periodic system divides it into periods and keeps the records at the end of every set period of time.
