The upper surface of the fern leaves known as fronds are shiny as a result of
the production of a waxy cuticle.
<h3>What is a Fern? </h3>
A fern is a type of vascular plant which doesn't produce flowers and
reproduces with the aid of spores. Ferns are mostly found in shaded areas
and have a characteristic shiny surface.
The shiny surface is however as a result of the production of waxy cuticles
by the epidermis of the leaves. The waxy cuticle helps to prevent the plant
from water loss.
Read more about Ferns here brainly.com/question/18530534
Answer:
D) males are hemizygous for the X chromosome
Explanation:
Both males and females have two sex chromosomes, but females have two X chromosomes and males have one X chromosome and one Y chromosome. When only one copy of a gene is present in the cell of a diploid individual, that gene is in hemizygous condition.
- A female can be heterozygous for a sex-linked trait, one X chromosome carrying a dominant allele and the other X chromosome carrying the recessive allele. In that case, the expression of recessive allele will be masked by the expression of the dominant allele.
- Males, however, only have one X chromosome, so any allele it carries will be expressed, regardless of its dominance. For that reason, the frequency of appearance of sex-linked traits will be higher in males than in females.