Answer:
In bold the correct answers
Sex-linked disorders _____.
affect males more than females
affect females more than males
can be carried by females, without being expressed
are always expressed in males
are caused by genes carried on the X and Y chromosomes
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Choose all the answers that apply.
In four o'clock flowers, red petals show incomplete dominance over white petals. If two pink flowers are crossed, _____.
the ratio of pink to red flowers will be 2:1
25 percent of the flowers will be white
50 percent of the flowers will be homozygous
25 percent of the flowers will be heterozygous
one fourth of the flowers will be hybrids
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Choose all the answers that apply.
Chromosomes _____.
are tightly coiled bundles of DNA
carry many genes
are found inside the nucleus of eukaryotes
can be used to diagnose genetic disorders
outnumber genes in a cell
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Choose all the answers that apply.
Asexual reproduction _____.
is slower than sexual reproduction
can occur by binary fission
creates exact genetic copies of a parent
allows very little genetic variation
is used by the body to replace dead skin cells
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In some pine trees, long needles are dominant over short needles. Which of the following statements is true?
A pine tree with long needles must be homozygous dominant.
A pine tree with short needles must be heterozygous recessive.
A hybrid pine tree will have the same phenotype as a homozygous dominant pine tree.
A hybrid pine tree will have the same genotype as a homozygous recessive pine tree.
