Question

which of the following describes a phenotype?
a physical trait
an allele combination
gametic separation
your genetic make - up
question 5
which of the following individuals will show a recessive phenotype?
hh only
yy only
gg only
a & b
a & c

Explanation:

First Question (Which of the following describes a phenotype?):

A phenotype is the observable physical or biochemical characteristic of an organism, determined by its genotype and environment. "A physical trait" matches this definition. "An allele combination" is a genotype, "Gametic separation" is a process in meiosis, and "Your genetic make - up" is a genotype.

For a recessive phenotype to be expressed, the genotype must be homozygous recessive (two recessive alleles). Among the options, only "gg only" has a homozygous recessive genotype.

Answer:

A. A physical trait

Question 5 (Which of the following individuals will show a recessive PHENOTYPE?):

To show a recessive phenotype, an individual must have a homozygous recessive genotype (two recessive alleles). Let's analyze each option:

• Hh only: Hh is heterozygous. In most cases of simple Mendelian inheritance, the dominant allele (H) will be expressed, so the recessive phenotype will not be shown.
• YY only: YY is homozygous dominant, so the dominant phenotype will be shown.
• gg only: gg is homozygous recessive. So the recessive phenotype will be shown.
• a & b: As we saw, Hh (a) and YY (b) do not show the recessive phenotype, so this is incorrect.
• a & c: Hh (a) does not show the recessive phenotype, so this is incorrect.