What phenotypic ratio would you expect as a result of a test cross between a dihybrid organism and one that is homozygous recessive for alleles at two independent loci?
a. 3:1
b. 9:3:3:1
c. 1:1:1:1
d. 1:2:1
e. 9:4:2:1
Answer:
c. 1:1:1:1
Explanation:
When a heterozygous individual for two genes is test crossed with a double homozygous recessive individual, the progeny is obtained in 1:1:1:1 phenotypic ratio. This occurs as the heterozygous dominant individual forms four types of gametes in 1:1:1:1 ratio while the homozygous recessive individual would form only one type of gamete having one recessive allele for each gene.
For example, a test cross between TtRr (tall and red) and ttrr (short and white) would produce a progeny in following ratio=
1 tall, red: 1 tall, white: 1 short, red: 1 short, white
Here, T= tall, t= short, R= red, r= white
Answer:
The correct answer will be-Orbicularis oris muscle
Explanation:
The muscle which is present in the mouth is known as the oribicularis oris which consists of various muscular fibres in a different direction.
The oris muscle is derived from the other facial muscles inserted into the lips and join with the lips controlling the movement of the lips.
The muscle controls the movement by pulling down the corners of the mouth and the lips along with other muscles like the mentalis, the triangularis and the risorius.
Thus, Orbicularis oris muscle is the correct answer.
Answer:
That the adult has more cells than the baby?
Explanation:
Cells are the basic unit of structure and function in all living organisms. Which describes the GREATEST difference between the cells of a baby gorilla and the cells of an adult gorilla? The adult has more cells than the baby.
Sorry if its wrong
It would be C, The internal structure of cells withing the body. Microscopes are designed to look at cells, as the magnification is at that level.
