Question

Question 48 (1 point) A guinea pig with the genotype GgBBcc is heterozygous for two genes. O homozygous for one gene. heterozygous for three genes. O homozygous for two genes. Question 49 (1 point) Which cells in animals and plants are typically haploid? epithelial cells digestive cells ribosomes gametes Question 50 (1 point) Asexual reproduction and sexual reproduction are different in that: individuals reproducing asexually transmit 100% of their genes to their of MacBook Pro Q E

Answer 1

Answer 48:

homozygous for two genes.

Explanation:

A guinea pig with the genotype GgBBcc is homozygous for two genes, i.e., for gene B (BB) and gene c (cc) and heterozygous for one gene (Gg). Thus, it is the correct option.

Answer 49:

gametes

Explanation:

Gametes cells in animals and plants are typically haploid (n). Thus, it is the correct option.

Answer 50:

all of the above

Explanation:

Asexual reproduction and sexual reproduction are different in that— (i) individuals reproducing asexually transmit 100% of their genes to their offspring because asexually reproduced cells are produced by division from parental cells while those reproducing sexually only transmit 50% because sexually reproduced cells are produced by fertilization in which process male and female gametes are combined to form new offspring. (ii) Asexual reproduction produces offspring that are genetically identical to their parent, while sexual reproduction produces genetically unique offspring. (iii) Asexual reproduction involves one parent, while sexual reproduction involves two. So, all the statements are corrects. Thus, it is the correct option.

Answer 51:

heterozygous

Explanation:

If fertilization involves two gametes that contain different alleles of a given gene, the resulting offspring is heterozygous. Suppose a gene contain two alleles A and a then if fertilization involves two gametes that contain different alleles, i.e., one gamete contains A allele and another gamete contain a allele then the offspring will be heterozygous (Aa). Thus, it is the correct option.

Answer 52:

purple flowers, tall

Explanation:

Let P- purple flowers and p white flowers, and T- tall plants and t - dwarf plants. If the upper case letters represent the dominant alleles, i.e., P is dominant over p and T is dominant over t. The possible genotypes for these P and p alleles will be PP (homozygous dominant), Pp (heterozygous) and pp (homozygous recessive). PP and Pp will produce purple flowers as phenotype and pp produce white flowers as phenotype. Similarly the possible genotypes for these T and t alleles will be TT (homozygous dominant), Tt (heterozygous) and tt (homozygous recessive). TT and Tt will produce tall plants as phenotype and tt produce dwarf plants as phenotype. So, the phenotype of a plant with the genotype PpTt will be purple flowers, tall plant. Thus, it is the correct option.

Answer 53:

PT, Pt, pT, and pt

Explanation:

Let P- purple flowers and p- white flowers, and T- tall plants and t - dwarf plants.

Genotype of heterozygous for both traits will be— PpTt

Gametes for PpTt—

	P	p
T	PT	pT
t	Pt	pt

So, the genotypes of the gametes that are produced by a plant that is heterozygous for both traits are— PT, Pt, pT, and pt. Thus, it is the correct option.

Answer 54:

RR red leaves + rr white leaves produces Rr pink leaves

Explanation:

In incomplete dominance neither allele is dominant over another. In heterozygous condition it produces a new phenotype. So, here two allele R and r show incomplete dominance. So, two homozygous conditions, i.e., RR and rr produce red leaves and white leaves as phenotype but in heterozygous condition (Rr) produces Rr pink leaves as phenotype. So, it is an example of incomplete dominance. Thus, it is the correct option.

Answer 55:

Can receive O blood

Explanation:

A person with phenotype A blood can receive O blood, because a person with phenotype A blood has either two I^A allele (I^AI^A) or one I^A and one I^O allele (I^AI^O) and the O blood group contains two I^O allele (I^OI^O) where I^A allele is dominant over I^O allele. So, a person with phenotype A blood can receive O blood. Thus, it is the correct option.