Answer:
C. On average, 25% of the children are affected by the autosomal recessive disease if both parents are carriers.
Explanation:
A recessive trait is always expressed in homozygous genotype only. To have progeny with recessive traits from two normal parents, both the parents should be heterozygous carriers. For example, two normal parents with genotype "Aa" have 25% of the chances to have a child with homozygous recessive genotype (Aa x Aa = 1/4 AA: 1/2 Aa: 1/4 aa).
An autosomal trait is equally expressed in both males and females. Inbreeding increases the homozygosity and thereby, increases the risk of expression of recessive traits which are otherwise masked in heterozygous genotype.
The polymer that provides plants with their genetic traits is nucleic
acid. Nucleic acids are what made the DNA (deoxyribonucleic
acid). The DNA are composed of a nitrogenous base, phosphate and a sugar
(deoxyribose). The bases are adenosine, tyrosine, uracil and guanine. And they
are needed to be matched to carry the trait.
The nitrogenous base are the traits that contains the genetic material
and are mostly composed of nucleic acids.
Explanation:
They all are biotic factors
Answer:
O coral bleaching
Explanation:
Without the algae, corals lose their color and turn white. This is called “coral bleaching “.
Answer:
C) redundant organs present in an organism, which have been functional in the organism’s ancestors
Explanation:
Vestigial organ are bodily organs which are retained in the evolution however over a long period of time have lost their original functions and become reduced in size due to changes in the living habits. They serve as the evidence of evolution. They include caecum and appendix; coccygeal vertebrae
